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Determines the tangent of an angle. The angle is returned in radians.

Using the angle Alpha, the Tan Function calculates the ratio of the length of the side opposite the angle to the length of the side adjacent to the angle in a right-angled triangle.

Tan(Alpha) = side opposite the angle/side adjacent to angle

```
Tan (број)
```

Двојно

Number: Any numeric expression that you want to calculate the tangent for (in radians).

To convert degrees to radians, multiply by Pi/180. To convert radians to degrees, multiply by 180/Pi.

grad=(radiant*180)/pi

radiant=(grad*pi)/180

Pi is approximately 3.141593.

```
REM In this example, the following entry is possible for a right-angled triangle:
REM The side opposite the angle and the angle (in degrees) to calculate the length of the side adjacent to the angle:
Sub ExampleTangens
REM Pi = 3.1415926 is a pre-defined variable
Dim d1 As Double
Dim dAlpha As Double
d1 = InputBox("Enter the length of the side opposite the angle: ","opposite")
dAlpha = InputBox("Enter the Alpha angle (in degrees): ","Alpha")
Print "the length of the side adjacent the angle is"; (d1 / tan (dAlpha * Pi / 180))
End Sub
```