mathjs/docs/reference/functions/sin.md

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Function sin #

Calculate the sine of a value.

To avoid confusion with the matrix sine, this function does not apply to matrices.

Syntax #

math.sin(x)

Parameters #

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

Returns #

Type	Description
number | BigNumber | Complex	Sine of x

Throws #

Type	Description

Examples #

math.sin(2)                      // returns number 0.9092974268256813
math.sin(math.pi / 4)            // returns number 0.7071067811865475
math.sin(math.unit(90, 'deg'))   // returns number 1
math.sin(math.unit(30, '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