I need to simplify this expression to the simplest expression possible.
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csc(x)=1/sin(x); cot(x)=cos(x)/sin(x); 1/sec(x)=cos(x).

csc(x)cot(x)/sec(x)=(1/sin(x))(cos(x)/sin(x))cos(x)=cos2(x)/sin2(x)=cot2(x).

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