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2 January, 05:46

Verify this identity: secx-cosx = 1-cos^2x/cosx

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  1. 2 January, 06:09
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    Step-by-step explanation:

    sec x - cos x

    Secant is the inverse of cosine:

    (1 / cos x) - cos x

    Find the common denominator:

    (1 / cos x) - (cos² x / cos x)

    Subtract:

    (1 - cos² x) / cos x
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