9. Polar Equations

Given the polar equation $r=7\cos \left(\theta \right)$, which of the following is the corresponding Cartesian equation?

Given the point with polar coordinates $(3,\frac{\pi }{4})$, which of the following polar coordinate pairs labels the same point?

Which of the following is a polar equation for the curve represented by the Cartesian equation $x^2+y^2=3$?

Given the point with polar coordinates $(3,\frac{\pi }{4})$, which of the following polar coordinate pairs labels the same point?

Given the polar equation $r=9\cos \left(\theta \right)$, which of the following is its equivalent Cartesian equation?

Which of the following best describes the graph of the polar curve $r=2+5\sin \left(\theta \right)$?

Find the exact length of the polar curve $r=2$ for $0\le \theta \le 2\pi$.