How do you change the polar equation #r=3costheta# into rectangular form?

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Answer 1 · 2016-10-27T16:56:10

#x^2+y^2=3x#

for polars/rectangular

#x^2+y^2=r^2#

#x=rcostheta#
#y=rsintheta#

#r=3costheta#-----(1)

#xx# (1) by #r#

#r^2=3rcostheta#

#x^2+y^2=3x#