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24 June, 00:22

Convert to rectangular form r=4 cos theta

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Answers (2)
  1. 24 June, 00:30
    0
    R^2 = 4r costheta

    x = r costheta

    y=rsin thta

    r^2 = 4x

    x^2+y^2 = 4x

    r^2=x^2+y^2

    x^2+y^2=4x

    x^2+4x+y^2=0

    x^2-4x+4 + y^2=4

    (x-2) ^2+y^2 = 4
  2. 24 June, 00:36
    0
    Hello,

    x=r cos t

    y=r sin t

    x²+y²=r²

    r=4 cos t

    r=4x/r==>x²+y²=4x

    ==> (x-2) ²+y²=4 (a circle center (2,0), radius 2)
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