Calculus
posted by Josh on .
How can I convert polar coordinates to rectangular coordinates?

suppose you have a point (r,Ø)
Join the point to the origin and complete the rightangled triangle.
Call the point (r,Ø) as (x,y) in the rectangular system.
then
r^2 = x^2 + y^2
and tanØ = y/x
also :
x/r = cosØ > x = rcosØ
y/r=sinØ > y = rsinØ
Depending on the equation, you sometimes have to be very creative in converting from one system to the other.
Do you have an example?