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    dance16's Avatar
    dance16 Posts: 1, Reputation: 1
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    #1

    Feb 12, 2012, 03:24 PM
    verify the identity
    secx-sinxtanx=cosx
    tickle's Avatar
    tickle Posts: 23,796, Reputation: 2674
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    #2

    Feb 12, 2012, 03:38 PM
    What does this mean, or don't waste our time
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    ebaines Posts: 12,131, Reputation: 1307
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    #3

    Feb 13, 2012, 08:29 AM
    As usual for this type of problem - a good place to start is to replace the secant and tangent functions with their sine and cosine equivalents. Then you will be able to combine the left hand side into a single fraction, and finally use the identity 1-sin^2x =cos^2x to bring it home.
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