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Mathematics 19 Online
OpenStudy (anonymous):

Which of the following is an identity? a- tan^2x+cos^2x=1 b-(1-2sin^2x)csc^2x=4cos^2x-2 c-sinx-cosx+1=tanx d- sin^2xcot^2x+cos^2xtan^2x=1

OpenStudy (anonymous):

simplify D's left hand side... you'll eventually end up with 1. or try starting from the right and end up with the left hand part of D.... now that's hard...:)

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