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OpenStudy (anonymous):
Which of the following is not an identity? A. tan^2 x = sec^2 x - sin^2 x - cos^2 x B. (1+cos^2(x))/(sin^2(x))=1 C. (tanx + cotx)^2 = csc^2 x + sec^2 x D. (cosx + sinx)^2 = 1 + 2cosx sinx
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OpenStudy (anonymous):
A
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