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Math Help - Trig Equations

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    Trig Equations

    cos^2x-2sinxcosx-sin^2x=0 , 0<2x<pi

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  2. #2
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    Quote Originally Posted by Tiger View Post
    cos^2x-2sinxcosx-sin^2x=0 , 0<2x<pi

    Thanks and happy new year!
    note the following identities that may help solve this equation ...

    \cos^2{x} - \sin^2{x} = \cos(2x)

    2\sin{x}\cos{x} = \sin(2x)
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