tan

The tan() method returns the tangent of an angle expressed in radians. Tangent is the ratio between the sine and cosine of an angle (tan = sin/cos).

Interactive example

Syntax

function tan<
	GenericInput extends number,
>(
	input: GenericInput
): number

Parameters

• input: The angle in radians for which to calculate the tangent.

Return value

The tangent of the given angle. The value tends toward infinity when the angle approaches π/2 (90°) or -π/2 (-90°).

See also

• sin - Calculates the sine of an angle
• cos - Calculates the cosine of an angle
• atan - Calculates the arctangent

Sources

• MDN Web Docs - Math.tan()