I know you wanted to cancel the sine, but really?

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We can solve sin(2x)=sin(x) by using the double angle identity for sine but how do we solve the trig equation sin(πx)=sin(x)? Here I will show you a way to "cancel out the sine" when we have sine on both sides of an equation. Lastly, make sure you try cos(πθ)=cos(θ)

0:00 A challenge for all precalc and trig students
0:35 Q1 sin(2θ)=sin(θ)
4:12 Q2 sin(πθ)=sin(θ)
11:07 Check out Brilliant to learn more!
12:04 Question for you! cos(πθ)=cos(θ)

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