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Math Help - Polar form

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    Polar form

    How do you change the point ( 3, 9π/4) which is in polar form into rectangular form?
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  2. #2
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    Quote Originally Posted by jumpman23 View Post
    How do you change the point ( 3, 9π/4) which is in polar form into rectangular form?
    Have you been taught that x = r \cos \theta and y = r \sin \theta ....?
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