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+{{keywords>wiki library source code example reference}}
+===== sinh =====
+<code c>
+     double sinh(double);
+</code>
+return the hyperbolic sinus
+===== C Sourcecode Example =====
+compile in linux with: gcc sinh.c -o sinh **-lm** -Wall
+<code c>
+#include <stdio.h> /* including standard library */
+//#include <windows.h> /* uncomment this for Windows */
+#include <math.h> /* including math library */
+int main (void)
+{
+  double x;
+  x = log(4.2);
+  printf ("hyperbolic sine of %lf is %lf\n", x, sinh(x) );
+  return 0;
+}
+</code>
+==== output ====
+   output:
+   user@host:~$ ./sinh
+   hyperbolic sine of 1.435085 is 1.980952

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