Tan Function

Determines the tangent of an angle. The angle is specified 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

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Tan (Number)

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Double

Parameters:

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.

degrees=(radiant*180)/Pi

radiant=(degrees*Pi)/180

Pi is approximately 3.141593.

Error codes:

D'oh! You found a bug (text/sbasic/shared/00000003.xhp#err5 not found).

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' In this example, the following entry is possible for a right-angled triangle:

' The side opposite the angle and the angle (in degrees) to calculate the length of the side adjacent to the angle:

Sub ExampleTangens

' 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