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- *DECK SINDG
- FUNCTION SINDG (X)
- C***BEGIN PROLOGUE SINDG
- C***PURPOSE Compute the sine of an argument in degrees.
- C***LIBRARY SLATEC (FNLIB)
- C***CATEGORY C4A
- C***TYPE SINGLE PRECISION (SINDG-S, DSINDG-D)
- C***KEYWORDS DEGREES, ELEMENTARY FUNCTIONS, FNLIB, SINE, TRIGONOMETRIC
- C***AUTHOR Fullerton, W., (LANL)
- C***DESCRIPTION
- C
- C SINDG(X) evaluates the single precision sine of X where
- C X is in degrees.
- C
- C***REFERENCES (NONE)
- C***ROUTINES CALLED (NONE)
- C***REVISION HISTORY (YYMMDD)
- C 770601 DATE WRITTEN
- C 890531 Changed all specific intrinsics to generic. (WRB)
- C 890531 REVISION DATE from Version 3.2
- C 891214 Prologue converted to Version 4.0 format. (BAB)
- C***END PROLOGUE SINDG
- C JUNE 1977 EDITION. W. FULLERTON, C3, LOS ALAMOS SCIENTIFIC LAB.
- SAVE RADDEG
- DATA RADDEG / .017453292519943296E0 /
- C
- C***FIRST EXECUTABLE STATEMENT SINDG
- SINDG = SIN (RADDEG*X)
- C
- IF (MOD(X,90.).NE.0.) RETURN
- N = ABS(X)/90.0 + 0.5
- N = MOD (N, 2)
- IF (N.EQ.0) SINDG = 0.
- IF (N.EQ.1) SINDG = SIGN (1.0, SINDG)
- C
- RETURN
- END
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