Question

if sin A + sin² A =1 find the value of cos² A + cos⁴ A​

Answer 1

Step-by-step explanation:

sinA+sin

2

=1

sinA=1−sin

2

A

sinA=cos

2

A

Now

cos

2

A+cos

2

A.cos

2

A

=sinA+sin

2

A

=1 ...(given)