Here is the problem...
Write the polar equation r = cos [theta] + sin [theta] in rectangular form.
the parameters in polar coordinates are r and thetaOriginally Posted by skippydurge
the parameters in rectangular coordinates are x and y
these are related be
x= r cos(theta)
y = r sin(theta)
x^2 + y^2 =r^2
your equation :r = cos [theta] + sin [theta]
multiply whole equation by r
r^2 = rcos [theta] + rsin [theta]
x^2 + y^2 = x +y