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The ** cosh() function** returns the hyperbolic cosine of a number. To be more specific, it returns the hyperbolic cosine of a number in the radian float value.

Figure 1 shows the mathematical representation of the `cosh()`

function.

Note: The

`math.h`

header file is required for this function.

```
double cosh(double num)
```

This function requires a `number`

that represents an `angle`

in `radians`

as a parameter.

In order to convert `degrees`

to `radians`

, use the following formula:

```
radians = degrees * ( PI / 180.0 )
```

`cosh()`

returns the `hyperbolic cosine`

of a number `(radians float value)`

that is sent as a parameter.

#include<stdio.h> //header file #include<math.h> int main() { //positive number in radians printf("The hyperbolic cosine of %lf is %lf \n", 2.3, cosh(2.3)); // negative number in radians printf("The hyperbolic cosine of %lf is %lf \n", -2.3, cosh(-2.3)); //converting the degrees angle into radians and then applying cosh() // degrees = 90.0 // PI = 3.14159265 // result first converts degrees to radians then apply cosh double result=cosh(90.0 * (3.14159265 / 180.0)); printf("The hyperbolic cosine of %lf is %lf \n", 90.0, result); }

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math

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