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Module: Prelude
Function: atan
Type: Floating a => a -> a
Class: Floating
Description: inverse tangent
Related: acos, acosh, asin, asinh, atanh, cos, cosh, sin, sinh, tan, tanh
Keywords: tangent inverse, trigonometry
MATHWORLD Inverse Tangent

Example 1

Input: atan (pi/4)

Output: 0.665774