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OpenStudy (anonymous):
Which of the following equations are identities? Check all that apply. A. cot^2x + csc^2x = 1 B. sin^2x = 1 - cos^2x C. tan^2x = sec^2x - 1 D. sin^2x - cos^2x = 1
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OpenStudy (anonymous):
B,C
OpenStudy (anonymous):
memorize your identities, i guarantee you you will need them.
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