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Math Help - 1-cos^2 a + tan^2 a * cos^2 a

  1. #1
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    1-cos^2 a + tan^2 a * cos^2 a

    Hello,
    I can't find functions for 1-cos^2 {\alpha} + tan^2 {\alpha} * cos^2 {\alpha}
    I found that 1-cos^2 {\alpha} = sin^2 {\alpha}
    But where i can find functions for tan^2 {\alpha} * cos^2 {\alpha}?

    Thanks.
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  2. #2
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    sin^{2}(a)+\frac{sin^{2}(x)}{cos^{2}(x)}\cdot cos^{2}(a)=2sin^{2}(a)
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  3. #3
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    Quote Originally Posted by dzein View Post
    Hello,
    I can't find functions for 1-cos^2 {\alpha} + tan^2 {\alpha} * cos^2 {\alpha}
    I found that 1-cos^2 {\alpha} = sin^2 {\alpha}
    But where i can find functions for tan^2 {\alpha} * cos^2 {\alpha}?

    Thanks.
    \tan^2{\alpha} \cdot \cos^2{\alpha} = \sin^2{\alpha}
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