SINDG

This function evaluates the sine for the argument in degrees.

Required Arguments

X — Argument in degrees for which the sine is desired. (Input)

FORTRAN 90 Interface

Generic: SINDG (X)

Specific: The specific interface names are S_SINDG and D_SINDG.

FORTRAN 77 Interface

Single: SINDG (X)

Double: The double precision function name is DSINDG.

To avoid unduly inaccurate results, the magnitude of x must not be so large that the integer part fills more than the computer word. Under no circumstances is the magnitude of x allowed to be larger than the largest representable integer because complete loss of accuracy occurs in this case.

Example

In this example, sin 45° is computed and printed.

USE SINDG_INT

USE UMACH_INT

IMPLICIT NONE

! Declare variables

INTEGER NOUT

REAL VALUE, X

! Compute

X = 45.0

VALUE = SINDG(X)

! Print the results

CALL UMACH (2, NOUT)

WRITE (NOUT,99999) X, VALUE

99999 FORMAT (' SIN(', F6.3, ' deg) = ', F6.3)

END

Output

SIN(45.000 deg) = 0.707.