How to Find Measurements in Trigonometry

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There are many different things that you can use to find measurements in trigonometry depending entirely on what type of problem you're trying to solve. Find measurements in trigonometry with help from a mathematics educator in this free video clip.

Part of the Video Series: Trigonometry Education
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Video Transcript

Hi, I'm Jimmy Chang, and we're here to talk about how to find measurements in trigonometry. Now frankly there's many different things that you will need to use to find measurements in trigonometry because you either want to measure the sides, the angles, etc. but it all boils down to how well you know your definitions in trigonometry so let's just give a couple of examples and you'll see what I mean. Now, measurements by themselves is finding the sine of an angle, cosine of an angle, tangent of an angle, just to name a few. Now these by themselves, are measurements. Now the sine of an angle can be thought of as either Y over R if you're talking about a circle interpretation or it's the opposite leg over the hypotenuse. Similarly with cosine it's the X value over the radius R or you can think about it as the adjacent leg over the hypotenuse if you think about it as right triangle interpretation and tangent, over X or opposite leg over adjacent leg. Again it depends on what kind of scenario that you're looking for the circle definition or the right triangle definition. Now, to find the measurements of other things you want to think about perhaps The Pythagorean Theorem which is you remember A squared plus B squared is equal to C squared. Now this is also a measurement because you're wanting to find the measurements of the individual legs and the hypotenuse of a right triangle but for non-right triangles there's the loft sines as well as the loft cosines. But the bottom line here is as long as you know your definitions and as long as you know your formulas, you'll be able to find a wealth of measurements in trigonometry. So, I'm Jimmy Chang and that's how to find measurements in trigonometry.


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