Cos

Syntax

double cos(double x);

Function

Calculates cosine of x.

Parameters

Value in radians whose cosine is to be calculated.

Return Values

Cosine of x.

double x;x = cos(PI); // result -1 or double tangens(double x) {return sin(x) / cos(x);}

[sin](/en/syntax/general/math/sin) | [sqrt](/en/syntax/general/math/sqrt) | [exp](/en/syntax/general/math/exp)