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