Question

Sec^2 (pi/2 - x) * [sin^2 (x) - sin^4 (x)]

Answer 1

Answer:

Explanation:

Identity:  sec2θ=1+tan2θ

sec2(π2−x)−1=1+tan2(π2−x)−1

=tan2(π2−x)

Identity: tan(π2−θ)=cotθ

=cot2x