sin A + sin^2 A=1 then the value of cos ^2+ cos ^4 A is
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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)
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