SIN Function

Returns the sine of the input variable.

enabled.

Usage

result = SIN(x)

Input Parameters

x—The angle, in radians, that is evaluated.

Returned Value

result—The trigonometric sine of x.

Keywords

None.

Discussion

If x is of double-precision floating-point or complex data type, SIN yields a result of the same type. All other types yield a single-precision floating-point result. SIN handles complex numbers in the following way:

sin(x) º complex((sin(r)cosh(i), cos(r)sinh(i))

where r and i are the real and imaginary parts of x.

If x is an array, the result of SIN has the same data type, with each element containing the sine of the corresponding element of x.

Example

The following commands produce a dampened sine wave.

x = FINDGEN(200)

PLOT, 10000 * SIN(x/5) / EXP(x/100)

See Also

COS, COSH, SINH

For a list of other transcendental functions, see Transcendental Mathematical Functions in Volume 1 of this reference.