How do you convert #R=6/(2+cos(theta))# into cartesian form? Precalculus Polar Coordinates Converting Equations from Polar to Rectangular 1 Answer Cem Sentin Nov 28, 2017 #3x^2+12x+4y^2-36=0# Explanation: #r=6/(2+cos(theta))# #2r+rcos(theta)=6# For polar coordinates; #r# is equal to #sqrt(x^2+y^2)# and #rcos(theta)# is equal to #x# in cartesian ones. Hence, #2sqrt(x^2+y^2)+x=6# #2sqrt(x^2+y^2)=6-x# #4*(x^2+y^2)=(6-x)^2# #4x^2+4y^2=x^2-12x+36# #3x^2+12x+4y^2-36=0# Answer link Related questions What is the polar equation of a horizontal line? What is the polar equation for #x^2+y^2=9#? How do I graph a polar equation? How do I find the polar equation for #y = 5#? What is a polar equation? How do I find the polar equation for #x^2+y^2=7y#? How do I convert the polar equation #r=10# to its Cartesian equivalent? How do I convert the polar equation #r=10 sin theta# to its Cartesian equivalent? How do you convert polar equations to rectangular equations? How do you convert #r=6cosθ# into a cartesian equation? See all questions in Converting Equations from Polar to Rectangular Impact of this question 2824 views around the world You can reuse this answer Creative Commons License