How do you convert #x^2+y^2=9# into cartesian form?

1 Answer
Shwetank Mauria
Nov 6, 2016

The equation #x^2+y^2=9# is already in Cartesian form.

Explanation:

The equation #x^2+y^2=9# is already in Cartesian form.

The relation between Cartesian coordinates #(x,y)# and polar coordinates #(r,theta)# is

#x=rcosteta# and #y=rsintheta# i.e. #x^2+y^2=r^2#

Hence equation in Cartesian form #x^2+y^2=9# can be written in polar form as #r^2=9# or #r=3#

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