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Mathematics 18 Online
OpenStudy (anonymous):

Which of the following are NOT trigonometric identities? Check all that apply. 1) 1-tanxtany=cos(x+y)/cosxcosy 2) secx-cosx/secx=sin^(2)x 3) tanxcosxcscx=1 4) 4cosxsinx=2cosx+1-2sinx

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