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Verify the identity.

csc t − sin t/csc t= cos2 t

  • precalculus -

    You are missing a parenthesis !!!
    I assume that you mean:

    (csc t - sin t)/csc t

    (1/sin t - sin t) /(1/sin t)

    (1 - sin^2 t) / 1

    cos^2 t

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