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Thread: proving identities basic

  1. December 11th 2010, 05:56 AM #1
    Chr2010
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    proving identities basic

    Hi, I would just like to confirm i have the correct answer before I move on.

    sinx + tanx = tanx (cosx + 1)

    I found both sides equal 2sinx.......
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  2. December 11th 2010, 06:15 AM #2
    e^(i*pi)
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    With identities you should work only on one side and get it to equal the other:

    From the RHS \tan(x)\cos(x) + \tan(x) = \sin(x) + \dfrac{\sin(x)}{\cos(x)} = \sin(x) + \tan(x)
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