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harris910

The ** atan()** function (also called the

`arc tangent`

function) returns the To be more specific, it returns the inverse tangent of a number in `radians`

.

Figure 1 below shows the mathematical representation of the `atan()`

function.

Figure 2 shows the visual representation of the `atan()`

function.

To convert `radians`

to `degrees`

, use the following function.

```
rad2deg(angleInRadians)
```

```
atan(num)
```

This function requires a number as a parameter.

`atan()`

will return the `inverse tangent`

of a number (in radians) that is sent as a parameter.

The return value lies in the interval of `[-pi/2,pi/2]`

radians.

#this header for rad2deg() function use Math::Trig; #Positive number in radians $a = atan(0.5); print "atan(0.5): $a Radians\n"; #negative number in radians $b = atan(-0.5); print "atan(-0.5): $b Radians\n"; #applying atan() and then converting the result in radians to degrees #radians = 1.0 $c = rad2deg(atan(1.0)); print "atan(1.0): $c Degrees\n";

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