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  • trig -

    I think you must be usint * as the power to, as in ^

    right side: (csc^2 x - 2)/csc^2 x
    (1-2sin^2x) = 1-2(1-cos^2x)=-1+2cos^2x
    which is clearly not an identity.

    So I am not certain what your problem is.

  • trig -

    Your use of * in the last 3 posts will cause confusion

    * means multiplication
    / means division and
    ^ means "to the exponent"

    so you want to say
    cos^2 x=csc^2 x-2/csc^2 x

    but that statement is not true for all x's, I just tried any x and it did not work.
    Use brackets to establish the proper order of operations.

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