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OpenStudy (anonymous):
Which of the following are identities? More than one may apply. A) sin x + sin 5x = tan 3x B) ( sin x + cos x)^2 = 1 + sin 2x C) cos^2 3x- sin^2 3x = cos6x D) sin^6 x+ cos^6 x= 4 - 3 sin^2 2x
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OpenStudy (anonymous):
just B
OpenStudy (anonymous):
Do I get a medal?
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