Need help figuring out the sine, cosine, and tangent of an angle in a right triangle? Need to know how to solve a matrix-form linear equation in algebra? Need help solving problems involving 45°-45°-90° right triangles? You're in luck. From Ramanujan to calculus co-creator Got ...more

In this video tutorial, viewers learn how to find the length of a triangle using sine. This task is very easy, fast and simple to do. This formula can only be done on right triangles. Begin by finding the angle first and figure which trigonometric ratio to use. Then find which ...more

To find the length of a side of a triangle using cosine, you first need to find the angle and which sides are given. After you determine the angle and given sides, you'll need to figure out which trigonometric ratio to use. If you are given the adjacent side and the hypotenuse ...more

In this video tutorial, viewers learn how to find an angle using alternate interior angles. Make sure that the angles are alternate interior angles. Alternate interior angles are angles that are on the inside of the parallel lines, and on the opposite side of the transverse. T ...more

Consider two pairs of parallel lines, one pair horizontally and another is inclined from vertical position. If one of the four angles is given, then the other three angles can be easily identified. First select the angle which is down to the known angle, it will be same as fir ...more

In this tutorial the instructor shows how to find an inscribed angle when its corresponding arc degree is given. He shows how to do this with the help of an example. He states that the angle of arc degree is always twice the angle of its corresponding inscribed angle. So now t ...more

Could you use a little help figuring out how to find an unknown angle in a paralellogram? Watch this free video geometry lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And ...more

For people who are having problems with certain parts of geometry, this video will offer you advice on how to find a missing angle on the outside of a triangle when you are provided with the measurements of the other two angles in the triangle. Since the sum of the angles in a ...more

This math tutorial shows you using geometry how to find a central angle. The teaching tutorial shows you how each line and angle are used to determine the angles within the geometry problem so that you can figure out the answer to a question. The specific math problem is used ...more

mathproblemgenerator.com provides a video about how to find a central angle with a given radius and a tangent. The angle at the intersection of the radius and the tangent is equal to 90 degrees. The second angle is also given in the problem. So the central angle is equal to 18 ...more

Are math problems getting you down? Well this should be of some help. Here is how to find a missing angle inside of a triangle. Now the first thing to remember when solving this type of question is that the sum of all the three angles inside a triangle is equal to 180 degrees. ...more

In this video the author shows us how to find the measure of a central angle when its corresponding arc degree is given. He shows how to solve this kind of problem by solving an example. He states the central angel made by the arc is nothing but the given arc degree and states ...more

In this tutorial the instructor shows a method to compute the interior angle sum of a polygon. He gives us the formula for the interior angle sum of a convex polygon as (n-2) * 180 where n is the number of sides of the polygon. He goes and take a 6 sided polygon as an example ...more

This video shows how to solve a very basic yet very important geometric problem which is, finding a missing angle of a triangle. This videos shows the viewers more than one basic information about the triangle. It is a short and simple example which is very much helpful for th ...more

This tutorial the shows how to find out the measure of an exterior angle of a regular polygon. He shows the formula to find it which is 360/n, where n is the number of sides of the regular polygon. He goes on further to explain the formula by taking an 18-sided regular polygon ...more

This video shows you how to easily find the area of a triangle when you know the length of 2 sides and the angle between them. The first thing you have to do is mark the sides of the triangle by a, b, c, where a is the side between A and B, b is the side between B and C and c ...more

Azimuth is simply the angle of an object in the sky along the horizon. Yes, it's spherical trigonometry but it's not difficult! Check out this video and in just a few minutes you will be able to solve azimuth problems on your own. You Will Need: * The latitude and longitude of ...more

In order to find the cosine of a triangle in trigonometry, you will need to understand the CAH formula, part of the larger mnemonic of SOHCAHTOA, which outlines how to find the sine, cosine, and the tangent of an angle. The video offers accurate diagrams as well as examples in ...more

Remember the arcades? Were you saddened when they closed up one by one, leaving no outlet to actually go out and socialize while you played video games? With all the home consoles and internet connectivity, gaming has evolved, but the social factor has been eliminated. Sure we ...more

Super Mario 64 is one of the most influential games of all time and a favorite of TAS aficionados the world over. This video will teach you a cool TAS trick that will allow you to skip the Dire, Dire Docks level and improve your competition time substantially. From the Creato ...more

Omar, Hayley, Gary, and Autumn teach us how to use a protractor. They give a bit of information from About.com on the history of protractors. They are used to measure angles. The first protractor was used to help with navigation and invented in 1801. To measure an angle, line ...more

As the best-selling toy of all time, the odds of you once playing with a Rubik's Cube are pretty high. And if you're like me, or even the cube's inventor Erno Rubik, your first attempts likely ended in futility. Every twist, every turn, the cube just gets more and more mixed u ...more

This video series takes you through every step of building a building in SketchUp and is taken from chapter 4 of "Google SketchUp for Dummies" in case you want to follow along. PART 1 explains how to switch to a 2D view to get you ready to build the floor plan. It's a good ide ...more

This video is how to open a metal can with the corner of a knife. First, you must find a knife that has a ninety-degree angle where the corner is a sharp point. A cleaver, like the one shown in the video, type of knife would be best. You use the corner to puncture the can and ...more

The flagpoles at the end of each level in Super Mario Bros are rewarding when you're playing the game, but if you're setting up a TAS they suddenly become infuriating wastes of time. This video will show you how to TAS skip the flagpoles, which should improve your time substan ...more

Shooting technique: Locking your ankle and pointing your toes down when striking the ball is probably the most important factor in developing the proper shooting technique. It is probably the hardest skill to learn in soccer, but not anymore because I am here to guide you thro ...more

You may not realize it, but haveing your seat adjusted properly to the right height and angle, can help prevent any sort of injury. Not only will it keep you and your bike safe, but it will also improve your cycling efficiency. In this next video, you'll find out how to find ...more

This video will show you how to make a stop motion film using an editing program called Windows Movie Maker. Find a place to film your stop motion movie. Preferably a well lit area where the light source is constant. Set your camera on a tripod and position at the angle you pr ...more

Systm is the Do It Yourself show designed for the common geek who wants to quickly and easily learn how to dive into the latest and hottest tech projects. We will help you avoid pitfalls and get your project up and running fast. Search Systm on WonderHowTo for more DIY episode ...more

In this tutorial, we learn how to find the interior and exterior angles of a triangle. I triangle has three angles and their measurement when added together will equal 180. For example, if one angle is 80 and another is 30, then start off saying the equation equals 180. Write ...more

The video teaches the viewer how to find the area of a parallelogram and the area of a triangle. For a parallelogram, the first step is to find the right angle, the line perpendicular to the base (this is a line you draw, not part of the parallelogram). The height of the line ...more

Let's build a SOLAR DEATH RAY!!! Step 1: Remove the screws along the edges of your TV making sure not to miss any. (Refer to YouTube repair videos for your model if there are any.) continue to remove screws until you've cleared out enough to remove the screen, and then clear o ...more

Inverse trig functions are used to find missing angles rather than missing sides. This video explains how to use inverse trig to find a missing angle. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belong ...more

In this video, we learn how to measure your space when drawing a landscape. First you want to draw a line in the middle and measure out the line to the top of the building, and create another line there. Measure the length and then measure the edge of the outside of the buildi ...more

Taylor Erkkinen, co-owner of the Brooklyn Kitchen, shows how to properly hone a knife Hold a butcher steel vertically. Place it on a towel on a flat surface in order to anchor and hold it in place. Most knifes are sharpened to 20 degrees. To find this angle, hold the knife per ...more

In this video tutorial the author shows how to use the Cosine Law. He shows how to find an angle of a triangle where he know all the sides of a triangle, using the cosine Law. He uses a lower case letter to designate a side and a capital letter to designate an angel apposite t ...more

Check out this video to learn how to use flintknapping to make flaked stone tools. Find an angle that is less than an ninety degree angle to strike the stone. Part 1 of 7 - How to Make flaked stone tools with flint knapping. Part 2 of 7 - How to Make flaked stone tools with f ...more

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 footsteps. With this four-part installment from Internet pedag ...more

In this tutorial, we learn how to improve cinematography lighting. The first style is used in music videos and some film. The second is a very naturalistic lighting that is showing real world lighting. The last type is minimal, where you are using natural light only. Turning o ...more

In this tutorial, we learn how to find the North Star. To find this, measure the angle distances on the sky, while using your hand stretched out at arm's length. For the angles, three joined fingers make 5 degrees and a fist makes 10 degrees. You can make 15 to 20 degrees usin ...more

I already had a mishap shooting my Canon 5d MII tethered....I broke my circuit board because of the stress that a USB cable causes the camera. I wish Canon went with their 1ds route and made a positive locking device, but alas they have not. So the best alternative I could fin ...more

JustMathTutoring This video shows the procedure of finding derivatives using the Chain Rule. The Chain Rule states that the derivative of a composition of functions is the derivative of the outside function evaluated at the inside multiplied by the derivative of the inside. Th ...more

If you are stuck in the wild and run out of matches, dip into your food supply and start a fire that way. This handy tutorial will show you how to stay warm with nothing but a can and a chocolate bar. You Will Need • Aluminum can • Chocolate bar • Towel, cloth, or paper • ...more

Drawing the letter D as a 3D block letter is easy and fun. To start simply draw the D like you normally would. Next, you need to draw another smaller D inside the first D. From there, draw another D on the outside of the first D. Color in the 3 stacked Ds with your first color ...more

1. Peel the mango from top to bottom. Using the Y-shaped peeler, work your way around the mango, removing the skin. If the fruit is not quite ripe, keep peeling it away until the pulp is bright yellow. As you expose more pulp, use a paper towel to hold the peeled mango so it d ...more

For an object to balance, you have to have the center of gravity directly above the base. Well, reverse that to see that you can also balance an object by having the center of gravity directly below its base. To try that, you will need: - 2 forks - a piece of apple, potato o ...more

Building a LEGO sink is not difficult at all. You will need only 6 simple parts: 2 1x2 thins, 1 2x2 thin, one sink element (this is kind of rare so if you're not able to find it, you may have some trouble making the sink), and 2 1x1 right-angle elevated bricks. Starting with t ...more

In order to find the best drill bits to drill in metal, you should look at the angle of the bit. It will need to have a center point. Bits only cut on the ends. The grooves on the sides are made to remove the excess. The point on the end determines how it will cut. Titanium bi ...more

There’s a race on to see who'll be the Instagram of moving pictures. This makes sense, since many of our phones are clogged with video that, so far, no one is going to see. Wouldn’t it be great if there were a simple app that could take our video content, edit it for us, and t ...more

This video shows how to use a wire wheel brush on an angle grinder to remove rust or old paint from metal so that it looks practically brand new. The brush is easy to find at any hardware store and costs $15-$20. He shows how to attach the brush to an angle grinder. He then de ...more

In this tutorial, we learn how to score a big buck or elk with Stan Potts. First, take the bottom of it and remove a bottom line from the main beam. Measure the length of all of the sides. If you're going to cut it out, you should be perfectly even with the top. Then, you will ...more

In this tutorial, we learn how to understand angle relationships. Start out by drawing an angle out and looking at the different parts of it. From here, you will start to find where the different angles are. Linear pairs equal 180 degrees and are on a straight line. Once you l ...more

In this video the instructor shows how to find the slope of a line given two points that like on the line. Slope of a line is the measure of the steepness of the line compared to the angle made by the line with the x-axes. A line with positive slope slants forwards and a line ...more

In this math lesson we will investigate easy Pythagorean Theorem proofs and problems. The Pythagorean Theorem takes place in a right triangle. The longest side in a right triangle is called hypotenuse, and the other two sides are called legs. The hypotenuse opposes the right ...more

It was brought up a while back in a Community Call to Arms that *math* is handy for encryption (and let's face it, everything) so let us go over things you just have to know. "In its simplest meaning in mathematics and logic, an operation is an action or procedure which produc ...more

Rockets are lots of fun when you are launching them. However, finding them can be an arduous if not maddening task. Fancy space rockets have lots of tracking equipment to make touchdowns as simple as pie. Today, we look at embedding LEDs into your hobby rocket for easy night f ...more

Looking to get the best multichannel audio out of your home theater? It turns out that distance isn't nearly as critical as the angle at which they point toward the listener! Dolby was generous enough to share some more tips for maxing out the performance of your multichannel ...more

Even if you live in a big city, chances are you have some wild raccoons or foxes that cannot abide a vertical trash barrel. While apparently omnipresent, these phantasmic critters usually vanish in the night leaving only a shameless trail of refuse you never wanted to see ever ...more

If you're like me, you were always jealous of the kids with rich parents who got to ride around in their own Power Wheels cars. Now that I am tall enough to sell my body and time, I find myself attaining childhood dreams like buying my own Power Wheels car. I would not have ch ...more

This video is about deriving the area of a circle of radius 'r' using polar co-ordinate. First, we draw a circle and its radius 'r'. Then draw another radius close to it, so that it forms a small triangle-like figure. To find the area of the complete circle, divide the circle ...more