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Math Help - Do I have this right?

  1. #1
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    Question Do I have this right?

    I'm looking to find the trig polar form of -4+4i

    I came up with 4 times the sq root of 2 times (cos 7pi/4 + i sin 7pi/4)
    am I close or way off? Thanks in advance for the help!
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  2. #2
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    Quote Originally Posted by bemidjibasser View Post
    I'm looking to find the trig polar form of -4+4i

    I came up with 4 times the sq root of 2 times (cos 7pi/4 + i sin 7pi/4)
    am I close or way off? Thanks in advance for the help!
    Because -4+4i is in the second quadrant the argument is \frac{3\pi}{4}.
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  3. #3
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    Think Quadrant!!

    Negative x and positive y give what quadrant?

    7pi/4 gives what quadrant?

    Develop thought processes that help you be SURE. Guess is never good. Please don't try guessing when filing your taxes.
    Last edited by TKHunny; February 8th 2010 at 06:46 PM.
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