# Definition:Fresnel Cosine Integral Function

## Definition

The Fresnel cosine integral function is the real function $\R \to \R$ defined by:

$\displaystyle \map {\operatorname C} x = \sqrt {\frac 2 \pi} \int_0^x \cos u^2 \rd u$

## Also see

• Results about the Fresnel cosine integral function can be found here.

## Source of Name

This entry was named for Augustin-Jean Fresnel.