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--- c:complex.h:cacos [2013/02/03 19:13]
127.0.0.1 external edit
+++ c:complex.h:cacos [2024/02/16 01:06] (current)
@@ Line 1: / Line 1: @@
 ====== cacos ======
 <code c>
+double complex cacos(double complex z);
 </code>
 ==== description of cacos ====
-cacos is in work by code-reference.com \\
+compute the complex arc cosine of z\\
-if you are faster... don't hasitate and add it
+with branch cuts outside the interval (from -1 to +1) along the real axis.
 <code c>
-no example at the moment
+#include <stdio.h>
+#include <complex.h>
+int main( void )
+{
+   long double complex zlong=4.2 + I*2.34;
+   double complex zdouble=(double complex)zlong;
+   double result;
+   result = cacos(zdouble);
+   printf("cacos(%f + I*%f) = %f\n", creal(zdouble), cimag(zdouble), result);
+   return 0;
+}
 </code>
 ===== output of cacos c example =====
-    no example at the moment
+    cacos(4.200000 + I*2.340000) = 0.517664

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