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Mathematics, 30.09.2019 16:30 annalaurie7
Which of the following is not an identity? a: (cosx+sinx)^2=1+2cosx sinx b: 1+cos^2x/sin^2=1 c: tan^2x=sec^2x-sin^2x-cos^2x d: (tanx+cotx)^2=csc^2x+sec^2x
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Which of the following is not an identity? a: (cosx+sinx)^2=1+2cosx sinx b: 1+cos^2x/sin^2=1 c: ta...
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