Question

if sinQ+sin²Q=1 then cos²Q+cos⁴Q =? ​

Answer 1

Answer:

cos²Q+cos⁴Q=1

Step-by-step explanation:

taking rhs

(cos²Q=1-sin²Q)

1-sin²Q+(cos²Q)²

1-(1-sinQ)+(1-sin²Q)²

1-1+sinQ+(1-(1-sinQ))²

sinQ+(1-1+sinQ)²

sinQ+sin²Q

=1