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28-12-2017
Mathematics

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sinplify f (x)=cos (-x)csc (-x)

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mathmate mathmate

28-12-2017

f(x)=cos(-x)csc(-x)
=cos(x)(-csc(x))
=-cos(x)(1/sin(x))
=-cos(x)/sin(x)
=-cot(x)

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