Take your left hand and assign an angle to each finger as shown below. Sin = √Fingers below / 2. Cos = √Fingers above / 2. For example-Sin 60° = √Fingers below 60° finger/2 = √3/2 ...

Sketch the curve whose polar equation is \(r=-1+\cos \theta\text{,}\) indicating any symmetries. Mark on your sketch the polar coordinates of all points where the curve intersects the polar axis.