Question

Vertify the identity. sin^2 (θ−π/2) = cos^2θ

Answer 1

\[
\sin^2(\theta - \frac \pi 2)= = \left(- \sin( \theta - \frac \pi 2)\right)^2= \sin^2( \theta - \frac \pi 2)
\]

Answer 2

Can you finish it?

Answer 3

Is it (-cosθ) (-cosθ) = cos^2θ

Answer 4

Yes