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OpenStudy (anonymous):
Which of the following is not an identity? A. secx cscx(tanx + cotx) = sec^2x + csc^2x B. 2sin^2x - sinx = 1 C. sin^2x + tan^2x + cos^2x = sec^2x D. 2cos^2x - 1 = 1 - 2sin^2x
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OpenStudy (raden):
check option B, put x = 0 would the LHS be equal with the RHS ?
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