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Math Help - Trig Prove

  1. #1
    Member srirahulan's Avatar
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    Lightbulb Trig Prove

    (sin^(2)a-sin^(2)(b))/(sin(a)cos(a)-sin(b)cos(b))=tan(a+b)
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  2. #2
    Junior Member ignite's Avatar
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    Re: Trig Prove

    Consider these identities:
    sin(a+b)sin(a-b)=sin^2a-sin^2b
    sin(2a)=2sin(a)cos(a)
    sin(2a)-sin(2b)=2cos(a+b)sin(a-b)
    Please try to prove these identities.
    Using these your equation becomes:
    \frac{sin(a+b)sin(a-b)}{cos(a+b)sin(a-b)}=tan(a+b)
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  3. #3
    Member srirahulan's Avatar
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    Re: Trig Prove

    Great!
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