SIN

The periodic function SIN returns the trigonometric sine of X.

Calling Sequence

Result = SIN( X )

Arguments

X

The angle for which the sine is desired, specified in radians. If X is double-precision floating or complex, the result is of the same type. All other types are converted to single-precision floating-point and yield floating-point results. When applied to complex numbers:

sin x = COMPLEX(sin R cosh I , cos R sinh I )

where R and I are the real and imaginary parts of x .

If input argument X is an array, the result has the same structure, with each element containing the sine of the corresponding element of X .

Examples

To find the sine of 0.5 radians and print the result, enter:

PRINT, SIN(0.5)

The following example plots the SIN function between 0 and 2 p with 100 intervals:

X = 2*!PI/100 * FINDGEN(100)

PLOT, X, SIN(X)

Note: !PI is a read-only system variable that contains the single-precision value for p .

See Also

ASIN , SINH