# Parametrization

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**Parametrization**as edited by DavidB4-bot (Talk | contribs) at 20:18, July 29, 2016. This URL is a permanent link to this version of this page.**Parametrization** is a technique in calculus for expressing multiple variables in terms of only one variable, which is usually depicted as "t", over a specified range.

The most common parametrization is for a circle centered at the origin in the *xy*-plane:

Always remember to be precise in determining the new limits on the new parameter *t*.

This technique is particularly useful for calculating extrema and line integrals.