atan() / Reference / Processing.org

Name

atan()

Description

The inverse of tan(), returns the arc tangent of a value. This function expects the values in the range of -Infinity to Infinity (exclusive) and values are returned in the range -PI/2 to PI/2 .

Examples

float a = PI/3;
float t = tan(a);
float at = atan(t);
// Prints "1.0471976 : 1.7320509 : 1.0471976"
println(a + " : " + t + " : " +  at);

float a = PI + PI/3.0;
float t = tan(a);
float at = atan(t);
// Prints "4.1887903 : 1.7320513 : 1.0471977"
println(a + " : " + t + " : " +  at);

Syntax

atan(value)

Parameters

value(float)-Infinity to Infinity (exclusive)

Return

float

tan()
asin()
acos()

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