# Functions

### How To : Turn Your iPhone into a Fully Functional Samsung Smart TV Remote

After I traded in my Samsung Galaxy S5 for an iPhone 5S, the one feature I truly missed was the Smart Remote app. My television remote was broken and the S5 saved me from, you know, actually having to get up and change the channel. But thanks to Henrik Edwards and his JustABl ...more

### News : 20 Unique Android Apps That Offer Incredible Functionality

There are over 1.6 million apps on the Google Play Store, which makes it the largest collection of mobile apps on the planet. However, a large portion of this total is occupied by apps with overlapping functions—think social media, news, weather, music players, and various oth ...more

### How To : Find the formula of a piecewise function given a graph

This video shows how to find the formula of a piecewise function when given a graph. The first step is to write a definition for the graph, which is done by identifying the different domains shown in the graph. The second step is writing formulas for each domain specified by t ...more

### How To : Figure out the domain & range of a piecewise function

Need to calculate the domain and range of a graphed piecewise function? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the In ...more

### How To : Graph the probability density function in an Excel file

One of Microsoft Excel's capabilities is to allow you to graph Normal Distribution, or the probability density function, for your busines. This is a quick and easy tracking feature you can learn in just a few minutes.

### How To : Use Your Samsung Galaxy S3 Without a Functioning Home Button

Dorothy had it right: "There's no place like home." This is especially true when it comes to using your Samsung Galaxy S3, or pretty much any other smartphone, whose most vital button is the Home key. But what happens when that button no longer works? Replacements can be pri ...more

### How To : Unlock secret XBox 360 functions

Chris Pirillo demonstrates some lesser known features of the XBox 360 including: the Shut Down feature, Custom music, the manual moving visualization, composite and component video, and changing the vision camera effect.

### How To : Find critical values with T functions in MS Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's Excel ...more

### How To : Find the x & y intercepts of rational functions

In this tutorial the instructor shows how to find the x and y intercepts of rational functions. Finding the intercepts of a rational function is similar to finding the intercepts of other normal equations. You can find the x intercept of the equation by setting the value of y ...more

### How To : Make Your Minecraft House the Talk of the Town: How to Build Functioning Plumbing for Your Bathroom

Welcome to Minecraft World! Check out our tutorials, post to the community corkboard, and come play on our free server! Functioning bathrooms seem like a stretch in Minecraft, but with redstone, they're not that far out of reach! This past workshop focused on creating a fully ...more

### How To : Take Control of Your Mac's Sleep Functions with These Commands

Macs are generally highly power efficient due to, in part, the optimized sleeping schedule with OS X. Yet in certain scenarios, you might not want your Mac to go to sleep: downloading a huge file, reading a book, reviewing a spreadsheet, analyzing some content on the screen... ...more

### How To : Find the average value of a function over an interval

When you have to find the average of two or five numbers then you have to add all the numbers and then divide then by two or five respectively. However in the case of the function you have infinite many values over any interval. But it is not possible to add all and then divid ...more

### News : Come Make a Functioning Kitchen in Minecraft This Saturday

Welcome to Minecraft World! Check out our tutorials, post to the community corkboard, and come play on our free server! Are you looking for some fun and unique ways to spice up your kitchen in Minecraft? How about some awesome redstone contraptions to make your kitchen the be ...more

### How To : Use the SERIES chart function in Microsoft Excel 2010

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 732nd installment in their series of digital spreadsheet magic tricks, you'll learn how to make us ...more

### How To : Find and sketch the domain of a multivariable function

Looking for a primer on how to find and sketch the domain of a function z = f(x, y) in calculus? Learn how with this free video calc lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to auto ...more

### How To : Solve basic linear function word problems in algebra

Need some help solving linear function word problems? See how it's done with this free video math lesson. Need help finding the From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, ...more

### How To : Get Enhanced Copy & Paste Functions on Android for Easier Multitasking

For the most part, when you're copying text on your Android device, it's because you intend on pasting it into a different app than the one you're currently using. For instance, you might be looking at a posting on Craigslist. So you copy the seller's phone number, then head t ...more

### How To : Hide Secret Photos & Videos Inside an Unsuspicious, Functional Clock on Your Galaxy S3

No matter how careful or decent you are, there will always be pictures or videos that you want to keep private. They say a picture is worth a thousand words, but if someone were to go through my photo gallery, only one word would be coming out of my mouth—"%@&#!!" If you want ...more

### How To : Use the square root function in an Excel spreadsheet

This tutorial demonstrates how to use the Excel function SQRT. This allows you to determine the square root of any number, within a spreadsheet program.

### How To : Use the IF function with letter grades in Excel

This six-minute tutorial shows you how to use the logical IF function with letter grades in Excel. The video features a sample table with a sample assigned grading scheme ranging from A to F, which is a common application of the logical IF statement in Excel. After the data is ...more

### How To : 9 Ways to Use Gatorade for Function, Fun, & Frivolity

Gatorade: its popular red flavor can stain the whitest fabric, and its sweet taste is oddly refreshing after breaking a sweat. If you've ever participated in a sport, you probably spent halftime at games and practice breaks chugging the stuff. Though it made its name as a spor ...more

### How To : Find slant (oblique) asymptotes of rational functions

In this educational video the instructor shows how to find the slant asymptotes of rational functions. Slant or oblique asymptotes occur when the degree of the numerator is exactly one greater than the degree of the denominator of the rational function. The way to find the equ ...more

### How To : Turn on Google Pixel's 'Night Light' Function to Sleep Better

Blue light (like that from our smartphone) tricks the human brain into thinking it's still daytime, even if it's coming from something as small as a screen. So while you're playing around with your new Pixel or Pixel XL after dark, subconscious signals to be awake are preventi ...more

### How To : 9 Tricks to Keep Your Car Functioning in Freezing Temperatures

Nothing about living in a snowy climate is easy, but life with a snowy, frozen car doesn't have to be the worst part of your day. With a few clever hacks and some anti-weather tactics, you can fight off frozen windshields, icy locks, and even stubborn car doors, while keeping ...more

### How To : Solve problems involving functions in algebra

Need to know how to solve function problems in algebra? From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footst ...more

### How To : Use the flash functions on the Canon EOS 7D

The Canon EOS 7D digital SLR is the first Canon EOS camera that can trigger off-camera Speedlites with the cameras build in flash. The integrated Speedlite transmitter is fully compatible with the Wireless E-TTL Flash System. See exactly how all this works and how to use your ...more

### How To : Calculate commissions with Excel's VLOOKUP function

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 206th installment in their series of digital spreadsheet magic tricks, you'll learn how to calcula ...more

### How To : Use the DATEDIF function in Microsoft Excel 2007

Looking for a primer on how to use the DATEDIF function in MS Excel 2007? You're in luck. Whether you're new to Microsoft's popular digital spreadsheet application or a seasoned business professional just looking to better acquaint yourself with the Excel 2007 workflow, you're ...more

### How To : Evaluate combinations of functions from graphs

YouTube user NotesCollegeAlgebra teaches you how to evaluate combinations of functions from graphs. You start off with a graph and some functions. (f+g)(-3), (g/f)(0) and (fg)(-6). You start looking at the graph and the first line and you get (f+g)(-3)=f(-3)+g(-3)=3+1=4. (g/f) ...more

### How To : Use the basic functions of the Canon 7D

In this video, learn about the different functions of the Canon EOS 7D, which features an 8 frame per second shooting speed. This video goes over menu options & configuring the buttons, AF point selection, AF focus, & the flash functions.

### How To : Use an oscilloscope and function generator

If you're an electrical engineer, you needn't worry about this educational video, but if you aren't... Watch this tutorial to see how to use an oscilloscope and function generator. Learn all about how to use one of these oscilloscopes with this brief introduction to its work ...more

### How To : Make a full functioning A/C and heater

This video tutorial shows how to make a homemade air conditioner with cool/hot function. No need to buy both a heater and an a/c, this home-made device does both jobs. Watch this video circuitry tutorial and learn how to modify and build a full functioning air-conditioning and ...more

### How To : Multiply matrices with the MMULT function in MS Excel

Looking for a primer on how to create and work with array formulas in Microsoft Office Excel? You've come to the right place. In this free video tutorial from everyone's favorite MS Excel guru, YouTube's ExcelIsFun, the 12th installment in his series of Excel array formula ser ...more

### How To : Graph a quadratic function in factored form

This video deals with solving quadratic functions. It does not involve the use of the quadratic equation; rather, only factored equations are used. The speaker starts out with a factored quadratic equation. The speaker goes on to do the mathematical steps necessary to find bot ...more

### How To : Graph the greatest Integer or floor function

The video shows the explanation of greatest integer function. This video explains this with the help of graphs. The video first describes the basic greatest integer function. This means the greatest integer less than or equal to the number gave. The graph of this function is d ...more

### How To : Calculate age in Access using the DateDiff function

The Microsoft Office Access 2007 relational database manager enables information workers to quickly track and report information with ease thanks to its interactive design capabilities that do not require deep database knowledge. In this Microsoft Access video tutorial, you'll ...more

### How To : Solve mathematical functions and graphs

Check out this instructional math video that demonstrates how to calculate mathematical functions and graphs. In this 9th lesson, learn how to solve on SAT Algebra problems using the Official SAT Study Guide (as always). Here are the math problems and their page numbers that t ...more

### How To : Find the domain and range of a function

Need to calculate the domain and range of a function in algebra? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, ...more

### How To : Calculate quartiles with the Microsoft Excel 2010 QUARTILE function

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 725th installment in their series of digital spreadsheet magic tricks, you'll learn how to calcula ...more

### How To : Solve operations on rational functions (f o g)(x)

YAYMATH In order to use rational functions in intermediate algebra, Robert Ahdoot begins by setting values to the functions f(x) and g(x). He then adds these functions together, with the equation (f+g)(x). After addition comes subtraction, using the equation (f-g)(x). And fina ...more

### How To : Find the domain of a function without graphing

Want to find the domain of a function without graphing it? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's ...more

### How To : Create a savings plan with Excel's FV & PMT functions

Whether you're interested in learning Microsoft Excel from the bottom up or just looking to pick up a few tips and tricks, you're in the right place. In this tutorial from everyone's favorite digital spreadsheet guru, ExcelIsFun, the 22nd installment in his "Highline Excel Cla ...more

### How To : Use D functions (DSUM, DAVERAGE, DMAX) in MS Excel

video tutorial from ExcelIsFun, the 64th installment of his "YouTubers Love Excel" or YTLE series of free video MS Excel lessons, you'll learn how to Excel's D (i.e., database) functions such as DSUM, DAVERAGE, and DMAX.

### How To : Use an inverse trigonometric tangent function in Excel

This video demonstrates how to use the Excel function ATAN to determine the inverse trigonometric tangent function in a spreadsheet program.

### How To : Use the Wiimote's IR function to emulate a mouse

You can connect your Nintendo Wii Wiimote to your PC using GlovePie input emulation software and a bluetooth connection. See how to program scripts in Glovepie to use the infra-red sensor on the Wiimote to move the mouse cursor. Part 1 of 2 - How to Use the Wiimote's IR functi ...more

### How To : Force text formulas to wrap with Excel's CHAR function

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 228th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the ...more

### How To : Create a dynamic table for VLOOKUP function in Excel

You can use the vlookup function in MS Excel to create a dynamic table in your document. Creating a new dynamic table and a new dynamic lookup area enaables you to add new data or new columns to the lookup table. You can also create dynamic named ranges by using offset, vlooku ...more

### How To : Find the vertical asymptotes of rational functions

To find a vertical asymptote, you are trying to find values of x that produce 0 in the denominator but not in the numerator. If 0/0 occurs, that means you have a "hole" in the graph. A vertical asymptote is a place in the graph of infinite discontinuity, where the graph spikes ...more

### How To : Graph a rational function using limits

Need help figuring out how to graph a rational function with limits? Learn how to graph a rational function using limits to find discontinuities and functional asymptotes with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's ...more

### How To : Use the CONFIDENCE.T function in Microsoft Excel 2010

New to Microsoft Excel 2010? Looking for a few good tips and tricks? Look no further. In this free video tutorial from everyone's favorite MS Excel guru, YouTube's ExcelIsFun, the 7th installment in his series of Excel 2010 video tutorials, you'll learn how to use Excel's new ...more

### How To : Find the equation of trig functions by their graphs

Need to know how to determine the equations of trigonmetric functions by inspecting their graphs? Learn how. Learn how to use trigonometric functions to calculate the sides of a right triangle. Need to know how to solve a matrix-form linear equation in algebra? From Ramanujan ...more

### How To : Find the horizontal asymptotes of rational functions

Finding horizontal asymptotes is very easy! Not all rational functions have horizontal asymptotes. the function must satisfy one of two conditions dependent upon the degree (highest exponent) of the numerator and denominator. If the degree of the numerator is equal to the degr ...more

### How To : Add Functionality & Declutter the Android Lock Screen on Your Nexus 5

The Android lock screen interface is an integral part of our everyday use. For those of us who use lock screen security, it functions as a barrier between the sensitive data contained within our smartphones and potential outside access. Even if you don't use a pattern or PIN t ...more

### How To : Use Excel's DSUM & DMAX functions with date criteria

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 310th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the ...more

### How To : Add and subtract numbers with Excel's SUM function

As you might guess, one of the domains in which Microsoft Excel really excels is business math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, the 10th installment i ...more

### How To : Find the domain of a function in precalculus

Looking for a primer on how to find the domain of a function in precalculus? Learn how with this free video precalc lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, tha ...more

### How To : Find the formula for a piecewise function from a graph

Need to know how to find the formula for a piecewise function from a graph? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to th ...more

### How To : Convert degrees to radians with Excel's trig functions

New to Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this Excel tutorial from ExcelIsFun, the 234th installment in their series of digital spreadsheet magic tricks, you'll learn how to convert between degr ...more

### How To : Use the functions and features of a 6th-generation iPod Nano

Interested in becoming better acquainted with the sixth version of Apple's popular iPod Nano? This home-computing how-to from the folks at MacMost will teach you everything you'll need to know. For more information, including step-by-step instructions, and to get started using ...more

### How To : Graph piecewise defined functions

In this video the instructor shows how to graph a piecewise defined function. A piecewise defined function is a function that is defined in separate pieces. In these kind of functions, for different ranges of the value of x, you are given different small functions, all of whic ...more

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