Establish each identity. 1 - cos(2) + cos(4) -cos(6) = 4sincos(2)sin(3)
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Establish each identity.
1 - cos(2θ) + cos(4θ) -cos(6θ) = 4sinθcos(2θ)sin(3θ)
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1cos20 cos40 cos60 cos 0cos60cos40 cos20 2 sin 204...View the full answer
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