The function double sinh(double x); returns the hyperbolic sine of x radians.
Function prototype of sinh
double sinh(double x);
- x : A floating point value representing an angle in radians.
Return value of sinh
It returns the hyperbolic sine of x.
C program using sinh function
The following program shows the use of sinh function to calculate hyperbolic sine of an angle in radian.

#include <stdio.h>
#include <math.h>
int main(){
double value, radian;
printf("Enter a number\n");
scanf("%lf", &radian);
value = sinh(radian);
printf("The hyperbolic sine of %lf is %lf\n", radian, value);
return 0;
}
Output
Enter a number 0.25 The hyperbolic sine of 2.500000 is 0.252512