How do you convert #r=cos(theta)# into cartesian form?
1 Answer
Feb 10, 2016
# x^2 + y^2 = x #
Explanation:
using the formulae that link Polar to Cartesian coordinates.
#• r^2 = x^2 + y^2 #
#• x = rcostheta rArr costheta = x/r #
# • y = rsintheta # for this question :
# r = costheta # then
# r = x/r # ( multiply both sides by r )
hence
# r^2 = r xx x/r rArr r^2 = x #
# rArr x^2 + y^2 = x #
