simple-squiggle/node_modules/mathjs/docs/reference/functions/cos.md

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

Throws

Type	Description

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

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

See also

cos, tan