Question

cos x + cos^2 x =1 then find sin^2x +sin^4x ...​

Answer 1

Answer:

Explanation:

cos x= 1 -cos^2x

=> cos x= sin^2x(By using identity)............(i)

Now take, sin ^2x+sin^4x

=> sin^2x(1+sin^2x)

=> cos x( 1+cos x)(from i )

=> cos ^2x+ cos x= 1........