Question

if cos a +cos^2 a =1 then find the value of sin^2 + sin^4 A​

Answer 1

Answer:

cos^2a = 1- cosA

sin^2a = 1- cos2^a

put the value of cos^a

1-cosA +(1-cosA)(1-cosA)

1- cosA(1- 1+cosA)

1-cosA(cosA)