extend cmath (some of the functions are dummy)

[libm] / src / cmath / csin.c

diff --git a/src/cmath/csin.c b/src/cmath/csin.c
index ab72055..246a459 100644 (file)
--- a/src/cmath/csin.c
+++ b/src/cmath/csin.c
@@ -1,9 +1,9 @@
 #include "libm.h"
 
+/* sin(z) = -i sinh(i z) */
+
 double complex csin(double complex z)
 {
-       double complex r;
-
-       r = csinh(cpack(-cimag(z), creal(z)));
-       return cpack(cimag(r), -creal(r));
+       z = csinh(cpack(-cimag(z), creal(z)));
+       return cpack(cimag(z), -creal(z));
 }