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Mathematics 21 Online
OpenStudy (anonymous):

Which of the following is not an identity? A. sinx(cotx + tanx) = secx B. cos^2x - sin^2x = 1- 2sin^2x C. csc^2x + sec^2x = 1 D. cos^2x cscx - cscx = -sinx

OpenStudy (vijay):

c

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