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OpenStudy (anonymous):
1 + cos(2x) = cot(x)sin(2x)
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OpenStudy (anonymous):
LHS= 1+COS2X=1+2COS^2X -1=2COS^2X RHS= COTX.SIN2X=COSX/SINX.2SINXCOSX=2COS^2X LHS=RHS...........
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