Simple Inverse Tangent question

Discussion in 'Math' started by tadm123, Apr 24, 2014.

  1. tadm123

    Thread Starter Member

    Nov 20, 2013
    43
    0
    How can I solve for a constant when it's inside an inverse tangent?

    20=Tan^{-1}(a/30)


    Thanks.
     
  2. #12

    Expert

    Nov 30, 2010
    16,355
    6,852
    Spell it out in English
    20 degrees is the angle you find when you take the inverse tangent of (a/30)
    tan both sides of the equation
    tan 20 = a/30
    30 tan 20 = a
    a = 10.919107

    Proof:
    10.919107 /30 enter
    arc tan = 20
     
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  3. tadm123

    Thread Starter Member

    Nov 20, 2013
    43
    0
    Thanks for the explanation
     
  4. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    That's a good approach if equations get to you.

    :)
     
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