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for all values of X for which of the following is defined, find th value of cot^2(X)- csc^2(X)

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    cot^2(X)- csc^2(X)
    =(1/tan(x))2 - (1/sin(x))2
    =(cos(x)2-1)/sin(x)2
    =-sin(x)2/sin(x)2
    =-1

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