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Thread: Verifying Identities

  1. March 21st 2011, 06:37 AM #1
    PintsofGuinness
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    Verifying Identities

    Verifying that 2tanx/1+tan^2x = sin2x
    x represents theta.

    I have simplified it down to 2tanx/sec^2x. Should i simplify sec^2x even further? Any help would be appreciated.
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  2. March 21st 2011, 06:51 AM #2
    e^(i*pi)
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    Write \tan(x) and \sec^2(x) in terms of \sin(x) \text{ and } \cos(x)
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