1*47940Sbostic /*- 2*47940Sbostic * Copyright (c) 1980 The Regents of the University of California. 3*47940Sbostic * All rights reserved. 422993Skre * 5*47940Sbostic * %sccs.include.proprietary.c% 610549Sdlw */ 710549Sdlw 8*47940Sbostic #ifndef lint 9*47940Sbostic static char sccsid[] = "@(#)z_cos.c 5.2 (Berkeley) 04/12/91"; 10*47940Sbostic #endif /* not lint */ 11*47940Sbostic 1210549Sdlw #include "complex" 1310549Sdlw z_cos(r,z)1410549Sdlwz_cos(r, z) 1510549Sdlw dcomplex *r, *z; 1610549Sdlw { 1710549Sdlw double sin(), cos(), sinh(), cosh(); 1810549Sdlw 1910549Sdlw r->dreal = cos(z->dreal) * cosh(z->dimag); 2010549Sdlw r->dimag = - sin(z->dreal) * sinh(z->dimag); 2110549Sdlw } 22