Question

If Sintheta +sin²theta=1 , then sin²theta+sin⁴theta is ?​

Answer 1

Answer:

1

Explanation:

Given, sinθ+sin2θ=1

⇒sinθ=1−sin2θ=cos2θ

Therefore, cos 2θ+cos4θ

=cos 2θ(1+cos 2θ)

=sinθ(1+sinθ)

=sinθ+sin2θ= 1