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Math Help - More trig identity help?

  1. #1
    Newbie
    Joined
    Nov 2008
    Posts
    6

    More trig identity help?

    (cos x) ^2 * csc x
    ------------------------- + sin x=1

    (1+csc x)


    Best I could simplify it was

    Cos^2
    -----------
    sin + sin=1
    -----------

    (1+csc x)



    Help is appreciated, I suck at identities
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  2. #2
    Newbie
    Joined
    Jan 2006
    Posts
    5
    Hi Zabaf,

    It's a bit hard to tell what you wrote in your attempt. A good first step might be to write the csc's in the left-hand side in terms of sin's. That gives you

    <br />
\text{LHS} = \displaystyle \frac{\cos^{2}{x}\cdot \frac{1}{\sin{x}}}{1 + \frac{1}{\sin{x}}} + \sin{x}

    A good next step would then seem to be to multiply the top and bottom of the quotient on the left by sin(x).

    The next step is over to you!
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