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Math Help - inverse

  1. #1
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    inverse

    For -infinity < t < +infinity

    cos(arctan(t))

    need some direction for this bad johnny...thanks
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  2. #2
    Math Engineering Student
    Krizalid's Avatar
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    Try to express \cos t in terms of \tan t, can you do that?

    After that evaluate \cos(\arctan t).
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  3. #3
    GAMMA Mathematics
    colby2152's Avatar
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    Are you trying to find the inverse of: y=cos(arctan(t))? If so, simply switch your y's and t's: t=cos(arctan(y)), and then solve for y.
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