sin(15 degrees) = ?

We will evaluate the exact value of sin(15 degrees), i.e. sin(pi/12) but there are three ways of doing so. We will first use the angle-difference formula for sine, then the half-angle formula for sine, and finally a 15-75-90 special triangle. This tutorial will help you with your trigonometry and precalculus classes!

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0:00 3 ways of evaluating sin(15 degrees)
0:21 using angle difference formula
3:56 using half-angle identity
7:17 using15-75-90 special triangle