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Math Help - trig identity verifying

  1. #1
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    trig identity verifying

    (1+tanx)/(sinx+cosx)=secx

    sinx+cosx=(2sin^2x-1)/(sinx-cosx)
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  2. #2
    Junior Member
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    Sep 2008
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    For 1. use tan x = sin x / cos x and sec x = 1 / cos x
    For 2. use sin^2 x + cos^2 x = 1 in RHS
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