From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001
From: Vladimir Azarov <avm@intermediate-node.net>
Date: Tue, 1 Oct 2024 15:47:05 +0200
Subject: Initial version

---
 src/complex/ctan.c | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 src/complex/ctan.c

(limited to 'src/complex/ctan.c')

diff --git a/src/complex/ctan.c b/src/complex/ctan.c
new file mode 100644
index 0000000..918717b
--- /dev/null
+++ b/src/complex/ctan.c
@@ -0,0 +1,9 @@
+#include "complex_impl.h"
+
+/* tan(z) = -i tanh(i z) */
+
+double complex ctan(double complex z)
+{
+	z = ctanh(CMPLX(-cimag(z), creal(z)));
+	return CMPLX(cimag(z), -creal(z));
+}
-- 
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