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sin

Sine of argument in radians

Syntax

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

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Plot Sine Function

Plot the sine function over the domain $-\pi \leq x \leq \pi$.

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

Sine of Vector of Complex Angles

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

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X — Input angle in radiansnumber | vector | matrix | multidimensional array

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

Data Types: single | double
Complex Number Support: Yes

Output Arguments

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Y — Sine of input anglescalar value | vector | matrix | N-D array

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

More About

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Sine Function

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

sin(α)=opposite sidehypotenuse=ah.

The sine of a complex angle, α, is

sin(α)=eiαeiα2i.

See Also

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Introduced before R2006a

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