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Math Help - Stuck in this trigonometric equation...

  1. #1
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    Stuck in this trigonometric equation...

    I need to get from this:
    a^2 / 4*sin(x)*cos(x)

    To this:
    a^2 * tan(x)

    thanks
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  2. #2
    Behold, the power of SARDINES!
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    Quote Originally Posted by klik11 View Post
    I need to get from this:
    a^2 / 4*sin(x)*cos(x)

    To this:
    a^2 * tan(x)

    thanks
    That is not possible the statement is false!
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  3. #3
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    Thanks for the fast answer.
    Is 2*a^2 / 4*sin(x)*cos(x)
    false too?
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  4. #4
    Behold, the power of SARDINES!
    TheEmptySet's Avatar
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    Quote Originally Posted by klik11 View Post
    Thanks for the fast answer.
    Is 2*a^2 / 4*sin(x)*cos(x)
    false too?
    Just so we are clear is this what you intended in the first post.

    \frac{a^2}{4\sin(x)\cos(x)}=a^2\tan(x)

    you 2nd question does not make sense. An expression cannot be true or false in the first part you wanted to show the above identity was true and it isn't.
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  5. #5
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    Yes you were right...
    Last question for today:
    can
    a^2 * cos(2x) + a^2 / 2*sin(x)*cos(x)
    be
    a^2 * tan(x)
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  6. #6
    Behold, the power of SARDINES!
    TheEmptySet's Avatar
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    Quote Originally Posted by klik11 View Post
    Yes you were right...
    Last question for today:
    can
    a^2 * cos(2x) + a^2 / 2*sin(x)*cos(x)
    be
    a^2 * tan(x)
    Please use parenthesis do you mean

    \frac{a^2\cos(2x)+a^2}{2\sin(x)\cos(x)}

    or

    a^2\cos(2x)+\frac{a^2}{2\sin(x)\cos(x)}
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  7. #7
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    the second one
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  8. #8
    Behold, the power of SARDINES!
    TheEmptySet's Avatar
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    No what if

    x=\frac{\pi}{4}

    plug that into both equations and see what you get
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