Function cos

Calculate the cosine of a value.

For matrices, the function is evaluated element wise.

Syntax

cos(x)

Parameters

Parameter Type Description
x number | BigNumber | Complex | Unit | Array | Matrix Function input

Returns

Type Description
number | BigNumber | Complex | Array | Matrix Cosine of x

Examples

cos(2);                      // returns number -0.4161468365471422
cos(pi / 4);            // returns number  0.7071067811865475
cos(unit(180, 'deg'));  // returns number -1
cos(unit(60, 'deg'));   // returns number  0.5

var angle = 0.2;
pow(sin(angle), 2) + pow(cos(angle), 2); // returns number ~1

See also

cos, tan