# Calculus

how to convert this from rectangular to polar?

r=cos theta

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1. remember the formulas I gave you in your last post regarding this ?

r = √(x^2 + y^2) and x = rcosØ

so r = cosØ is
r = x/r
r^2 = x
x^2 + y^2 = x

which is the equation of a circle.

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