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OpenStudy (anonymous):
HELP POR FAVOR Which of the following is not an identity? A. sin^2x + tan^2x + cos^2x = sec^2x B. secx cscx(tanx + cotx) = sec^2x + csc^2x C. 2sin^2x - sin x =1 D. 2cos^2x - 1 = 1 - 2sin^2x
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OpenStudy (anonymous):
C. put x=0, you never get 1. just try it out...
OpenStudy (anonymous):
i don't even know how to do none of this..
OpenStudy (anonymous):
what's your grade? do u have an exam right now?
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