Question

If sin A + sin2A = 1 , the find the value of (cos2A + cos4 A)​

Answer 1

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