1 files changed, 20 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/complex/ccos.c b/winsup/mingw/mingwex/complex/ccos.c
new file mode 100644
index 000000000..ef5b5a70e
--- /dev/null
+++ b/winsup/mingw/mingwex/complex/ccos.c
@@ -0,0 +1,20 @@
+/*
+   ccos.c
+   Contributed by Danny Smith
+   2003-10-20
+*/
+
+#include <math.h>
+#include <complex.h>
+
+/* ccos (x + I * y) = cos (x) * cosh (y)
+    + I * (sin (x) * sinh (y)) */ 
+
+
+double complex ccos (double complex Z)
+{
+  double complex Res;
+  __real__ Res = cos (__real__ Z) * cosh ( __imag__ Z);
+  __imag__ Res = -sin (__real__ Z) * sinh ( __imag__ Z);
+  return Res;
+}