1 files changed, 9 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/complex/ctan.c b/libc-top-half/musl/src/complex/ctan.c
new file mode 100644
index 0000000..918717b
--- /dev/null
+++ b/libc-top-half/musl/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));
+}