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OpenStudy (anonymous):
1-cos(12x)= A. 2sin2(6x) B. 2cos2(6x) C. 2cos2(12x) D. 2sin2(12x)
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OpenStudy (anonymous):
its A
OpenStudy (anonymous):
\[\cos(2A) = 1 - 2\sin^2(A)\]
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