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Math Help - How we know the answer of tan-1 of polar will be system Deg or rad

  1. #1
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    How we know the answer of tan-1 of polar will be system Deg or rad

    Hi



    How we know the answer of tan-1 of polar will be Deg or rad in calcolator



    because i see in some questions the solving was Deg and anthor by rad

    for example (write in polar)
    1) -8 + 5i ----- > here we use rad to find tan-1
    2) -3 - 5i ------> here we use deg to find tan-1

    please i want help
    Last edited by r-soy; April 21st 2010 at 11:21 PM.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by r-soy View Post
    Hi



    How we know the answer of tan-1 of polar will be Deg or rad in calcolator



    because i see in some questions the solving was Deg and anthor by rad

    for example (write in polar)
    1) -8 + 5i ----- > here we use rad to find tan-1
    2) -3 - 5i ------> here we use deg to find tan-1

    please i want help
    You look to see what angle mode the calculator is in (it is usually a small field in the dispaly area). If there is no such flag then always set the mode before using any trig functions.

    CB
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