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Math Help - find the angle

  1. #1
    Junior Member
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    find the angle

    find the acute angle A to the nearest seond when
    (a) sinA= 0.30985 (b) cotA=0.52613 (c) tan A=0.13476
    please show work
    Last edited by harry; July 28th 2007 at 02:05 PM.
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  2. #2
    Eater of Worlds
    galactus's Avatar
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    Are you allowed to use calculator?. Are you expected to do these manually for some silly reason?.

    If you are expected to do these by hand these days, it's silly. Why don't we just revert to slide rules. No one does that in the real world.

    sin^{-1}(0.30985)=

    cotA\Rightarrow{A=tan^{-1}(\frac{1}{0.52613})}

    etc.
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