Convert from rectangular to polar coordinates? x^2 = -y^2 - 6y

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Answer 1 · 2017-12-13T18:05:42

#r=-6sintheta#

Using:

#x=rcos(theta)#
#y=rsin(theta)#

#r=sqrt(x^2+y^2)#

#x^2=-y^2-6y#

#x^2+y^2=-6y#

#r^2=-6rsintheta#

Divide by #r#

#r=-6sintheta#