1 files changed, 10 insertions, 0 deletions
diff --git a/2.3-1/src/c/elementaryFunctions/Trigonometry/sech/dsechs.c b/2.3-1/src/c/elementaryFunctions/Trigonometry/sech/dsechs.c
new file mode 100644
index 00000000..10ca392a
--- /dev/null
+++ b/2.3-1/src/c/elementaryFunctions/Trigonometry/sech/dsechs.c
@@ -0,0 +1,10 @@
+#include <math.h>
+#include "sech.h"
+#include "cosh.h"
+#include "cos.h"
+
+
+double dsechs(double in)
+{
+  return (1/cosh(in));
+}