Question

If sin A+sin2 A=1, then the value of (cos2 A+ cos4 A) is
(a) 1
(b)1/2
(c) 2
(d) 3
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Answer 1

Answer:

a.1 is the correct answer for your question

Answer 2

Answer:

1

Step-by-step explanation:

sinA+sin^2A=1

sinA=1-sin^2A

sinA=cos^2A

sin^2A=cos^4A

cos^2A+cos^4A=1...