# At a Glance - Polar Functions

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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