# Documentation

### This is machine translation

Translated by
Mouse over text to see original. Click the button below to return to the English verison of the page.

# sin

## Syntax

• Y = sin(X)
example

## Description

example

Y = sin(X) returns the sine of the elements of X. The sin function operates element-wise on arrays. The function accepts both real and complex inputs. For real values of X in the interval [-Inf, Inf], sin returns real values in the interval [-1 ,1]. For complex values of X, sin returns complex values. All angles are in radians.

## Examples

collapse all

Plot the sine function over the domain .

x = -pi:0.01:pi; plot(x,sin(x)), grid on 

Calculate the sine of the complex angles in vector x.

x = [-i pi+i*pi/2 -1+i*4]; y = sin(x) 
y = 0.0000 - 1.1752i 0.0000 - 2.3013i -22.9791 +14.7448i 

## Input Arguments

collapse all

Input angle in radians, specified as a scalar, vector, matrix, or multidimensional array.

Data Types: single | double
Complex Number Support: Yes

## Output Arguments

collapse all

Sine of input angle, returned as a real-valued or complex-valued scalar, vector, matrix or multidimensional array.

collapse all

### Sine Function

The sine of an angle, α, defined with reference to a right angled triangle is

The sine of a complex angle, α, is

$\mathrm{sin}\left(\alpha \right)=\frac{{e}^{i\alpha }-{e}^{-i\alpha }}{2i}\text{\hspace{0.17em}}.$

### Tall Array Support

This function fully supports tall arrays. For more information, see Tall Arrays.