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    princesss2013's Avatar
    princesss2013 Posts: 1, Reputation: 1
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    #1

    Sep 27, 2012, 02:57 PM
    verify the identity secx-cosx=sinxtanx
    I have no clue on what to do
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Sep 28, 2012, 06:12 AM
    Start by replacing the secx and tanx functions with their sinx and cosx equivalents. Then it's simply a matter of combining fractions, and applying the identity 1-cos^2x = sin^2x.
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