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    malemodel Posts: 1, Reputation: 1
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    #1

    Nov 30, 2010, 10:10 AM
    Verify the following identity:
    (sec x + tan x) (1-sin x)= cos x
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    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Nov 30, 2010, 10:37 AM

    As usual for this type of problem: convert the secx and tanx functions to their sinx and cosx equivalents. Just a little bit of manipulation is needed, and the identity sin^2x =1 - cos^2x, and it all falls right out.
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