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Math Help - Identity

  1. #1
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    Exclamation Identity

    find an expression that completes the identity,

    cos^2x/1-sinx = ?
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  2. #2
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    Quote Originally Posted by jumpman23 View Post
    find an expression that completes the identity,

    cos^2x/1-sinx = ?
    hint ... \cos^2{x} = 1 - \sin^2{x} ... then factor
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  3. #3
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    I'm still confused about what to do. How do you use this pythagorean identity with this?
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  4. #4
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    Quote Originally Posted by jumpman23 View Post
    I'm still confused about what to do. How do you use this pythagorean identity with this?
    factor 1-\sin^2{x} and see.
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  5. #5
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    does it end up equaling 1?
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  6. #6
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    \frac{\cos^2{x}}{1 - \sin{x}} = \frac{1 - \sin^2{x}}{1 - \sin{x}} = \frac{(1 - \sin{x})(1 + \sin{x})}{1 - \sin{x}} = 1 + \sin{x}<br />
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