Question

19. If sin + sin2As = 1, then the value of the expression (cos2a + cos4A) is
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Answer 1

Answer:

ANSWER

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)

please mark it as a brainlist answer please