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posted by on .

Match the trigonometric expression:

cos^2 [(pi/2) - x] / cos x

Does csc x match with this?

  • Math - ,

    cos(pi/2-x) = sinx
    (e.g. cos 70 = sin 20)

    [cos^2 (pi/2-x)]/cosx = sin^2 x/cosx
    = (sinx/cosx)sinx
    = tanxsinx

    Don't know what you mean by "match with this"

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