Sketch the cardioid with polar equation r=2(1+cos theta)
Prove that for all the chords POQ of the cardioid which pass through the pole O, the length of PQ is constant.
How do I do the green part?
I have gone as far as to deduce that if P (r1, theta1) and Q is (r2, theta2)
Then theta2=theta1-180
r2=2+2cos (theta1-180)
There isn't given a formula in the book to find the distance between two polar coordinates, I found one on net:
Here is the sketch of the graph:
I am stuck here for over two hours. Emergency help...I am drow...(Oops I gulped up some water)