Question

write each trigonometric expression in terms of a single trignometric function.

1-2(sin^2)5ß

Answer 1

\[\cos(2\theta)=\cos^2\theta-\sin^2\theta\\ \ \ \ \ \ \ \ \ \ \ \ \ =1-2\sin^2\theta\]

Answer 2

use this formula in reverse for:
\[1-2\sin^2\left( 5\beta \right)\]