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Mathematics 9 Online
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

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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