1 files changed, 14 insertions, 0 deletions
diff --git a/lib/libF77/z_cos.c b/lib/libF77/z_cos.c
new file mode 100644
index 0000000..bc9e23e
--- /dev/null
+++ b/lib/libF77/z_cos.c
@@ -0,0 +1,14 @@
+#include "f2c.h"
+
+#ifdef KR_headers
+double sin(), cos(), sinh(), cosh();
+VOID z_cos(r, z) doublecomplex *r, *z;
+#else
+#undef abs
+#include "math.h"
+void z_cos(doublecomplex *r, doublecomplex *z)
+#endif
+{
+r->r = cos(z->r) * cosh(z->i);
+r->i = - sin(z->r) * sinh(z->i);
+}