ArcTan

Returns the inverse tangent, in radians.

Module: Math

Signature

func ArcTan(x: float64) -> float64;
func ArcTan(x: float32) -> float32;

Parameters

Name	Type	Description
x	float64 / float32	Any value.

Returns

The angle in (-HalfPi, HalfPi) whose tangent is x, defined for every real x. ArcTan(±Inf) is ±HalfPi. A NaN argument propagates.

Example

import Math::ArcTan;

let a = ArcTan(1.0); // 0.7853981633974483 (QuarterPi)
let b = ArcTan(0.0); // 0.0

See also

• Math — the module overview
• Tan — the function ArcTan inverts
• ArcSin / ArcCos — the other inverse trigonometric functions
• ArcCot — HalfPi - ArcTan(x)