1 files changed, 6 insertions, 0 deletions
diff --git a/lib/libm/cacosh.c b/lib/libm/cacosh.c
new file mode 100644
index 00000000..00f0e736
--- /dev/null
+++ b/lib/libm/cacosh.c
@@ -0,0 +1,6 @@
+#include <complex.h>
+
+double complex cacosh(double complex z)
+{
+	return clog(z + csqrt(z + 1) * csqrt(z - 1));
+}