Function cos #

Calculate the cosine of a value.

For matrices, the function is evaluated element wise.

Syntax #

math.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 #

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

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

See also #

cos, tan

Fork me on GitHub