Question

Prove
that
sum ?sin^2A+cos^2A=1

​

Answer 1

Step-by-step explanation:

this is very simple question

Answer 2

Answer:

$\sin ^{2} (2a) + \cos ^{2} (2a) = 1 \\ \sin^{2} (2a) = 1 - \cos^{2} (2a) \\ \cos^{2} (2a) = 1 - \sin ^{2} (2a)$