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Inverse trig functions

  1. Oct 11, 2010 #1
    1. The problem statement, all variables and given/known data

    Determine [tex] sin(arctan(3))[/tex]

    3. The attempt at a solution

    I do not know how to start this. No special triangles : (.
     
  2. jcsd
  3. Oct 11, 2010 #2

    rock.freak667

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    You try putting A=tan-1(3)

    in which you would need to determine sinA.
     
  4. Oct 11, 2010 #3
    ahhh so could I write [tex]sinA = \theta[/tex]?
     
  5. Oct 11, 2010 #4

    rock.freak667

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    Well I was thinking more along the lines of if A=arctan(3), then you can get tanA

    and your problem was to find sin(arctan(3)) which becomes sin(A), which you can find by drawing suitable right angled triangles.
     
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