if sinA +sin2 A equals 1 then cos2 A+cos4 equals ?
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0
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Step-by-step explanation:
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
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