Figure 4.3.2. Graph of \ (r=1+3\cos (2\theta)\text {?}\) Consider the curve given by the polar equation \ (r=1-2\sin \theta\text {,}\) for \ (0\leq \theta \lt 2\pi\text {.}\) Find the Cartesian ...

tan θ = sin θ cos θ As the point P moves anticlockwise round the circle, the values of cos θ and sin θ change, therefore the value of tan θ will change. The graph has a period of 180°.

The graph of y = tan θ As the point P moves anticlockwise round the circle, the values of cos θ and sin θ change, therefore the value of tan θ will change. This graph has a period of 180°.