SOLUTION: Hi there! I am having trouble remembering how to do this problem. Convert the equation x^2+y^2+x=0 to polar form and solve the resulting equation for r. Thanks for viewing

Question 756605: Hi there! I am having trouble remembering how to do this problem. Convert the equation x^2+y^2+x=0 to polar form and solve the resulting equation for r.
Thanks for viewing
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Convert the equation x^2+y^2+x=0 to polar form and solve the resulting equation for r.
----
x = r*cos(theta)
y = r*sin(theta)
r = sqrt[x^2 + y^2]
----------------------------
x^2 + y^2 + x = 0
------
(r*cos)^2 + (rsin)^2 + r*cos = 0
-------
r^2[cos^2 + sin^2) + r*cos = 0
----
r^2 + rcos = 0
r(r+cos) = 0
----
r = 0 or r = -cos(theta)
==================
Cheers,
Stan H.
==================

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