Examples and derivations from the wonderful world of trigonometry
You should know how to label the most-frequently-used angles around the unit circle (circle of radius r = 1), both in degrees and radians. It's not that difficult if you just think of it as counting around the circle in different increments.
Minutes of your life: 3:25
You'll make your journey through trigonometry much easier if you memorize everything needed to derive the trig functions of 30˚, 45˚ and 60˚ angles. Here's how to do it.
Minutes of your life: 3:42
Here are two examples of how we use SOH-CAH-TOA trig. to solve for the missing sides of a right triangle. This is a basic skill in trigonometry that you should master.
Minutes of your life: 4:48 (two examples)
The law of sines is an important relationship between the angle measures and side lengths of non-right triangles. In this video you'll see where it comes from.
Minutes of your life: 2:04
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