value of cos 2A is=?
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1
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➡Cos 2A
➡2cos² A - 1
➡1 - 2sin² A
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FolloW Me
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2
cos2A=cos(A+A)
=cosA cosA - sinA sinA
=cos^2A - sin^2A
=cos^2A - (1 - cos^2A)
=2cos^2A - 1
rajnandanikumari33:
thanks
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