Sin 2A= 2cos^2 A.then find the value of A
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As we know that sin2A = 2cosA.sinA Now in the given equation sin2A = cosA Using the identity, we have 2cosA.sinA = cosA .. sinA = A = 30°
1
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Answer:
sin2A=2vos^2A
2sinA cosA=2cos^2A
sinA=cosA
sinA/cosA=1
tanA=1
tanA=tan45
A=45
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