PreCal

Write the polar equation in rectangular form r=-12 sinè

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  1. You should know that
    r^2 = x^2 + y^2 and sinØ = y/r

    so in r = - 12sinØ
    r = -12y/r
    r^2 = -12y
    x^2 + y^2 = -12y

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  2. x^2+y^2-4x-12y+31=0

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