# Points, Vectors, and Functions

### Topics

We're ready to practice using polar coordinates.

Polar functions are the perfect opportunity to practice. We can think of polar functions like a bear itself, a polar bear in this case. We need to wrangle the polar bear for our confrontation with the calculus bear.

First, a few basics. A **polar function** is a function described by an equation of the form

r = *f *(θ).

The values of θ to be used will often be specified by an inequality α ≤ θ ≤ β.

The polar function r = *f *(θ) can also be described by the parametric equations

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