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Jlenok [28]
4 years ago
9

Simplify the expression by using a double-angle formula or a half-angle formula. (a) cos2 θ 2 − sin2 θ 2

Mathematics
1 answer:
SCORPION-xisa [38]4 years ago
6 0
If this is supposed to be
cos^{2}θ-sin^{2}θ
Then this can simply be reduced to
cos2θ
by the double angle formula for cosine



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