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Intro / Search / ZVON |

| Indexes | Syntax | >> Prelude << | Ratio | Complex | Numeric | Ix | Array | List | Maybe | Char | Monad | IO | Directory | System | Time | Locale | CPUTime | Random |

Module: | Prelude |
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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