Question

if sin theta+sin^2 theta=1,find cos^2theta+cos^4theta=?​

Answer 1

Step-by-step explanation:

We know that,

if

sinX+sin²X=1

then,

sinX=1-sin²X

sinX=cos²X

So,

cos²X+cos⁴X=sinX+sin²X

According to the given condition that sinX+sin²X=1

cos²X+cos⁴X

=1