LibreOffice 25.2 Help
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The arctangent is the inverse of the tangent function. The Atn Function returns the angle "Alpha", expressed in radians, using the tangent of this angle. The function can also return the angle "Alpha" by comparing the ratio of the length of the side that is opposite of the angle to the length of the side that is adjacent to the angle in a right-angled triangle.
Atn(side opposite the angle/side adjacent to angle)= Alpha
Atn (Number As Double) As Double
Double
Number: Any numerical expression that represents the ratio of two sides of a right triangle. The Atn function returns the corresponding angle in radians (arctangent).
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degree=(radian*180)/pi
radian=(degree*pi)/180
Pi is here the fixed circle constant with the rounded value 3.14159. Pi is a Basic mathematical constant.
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Sub ExampleAtn
REM rounded Pi = 3.14159 āĻšāϞ⧠āĻĒā§āϰā§āĻŦāύāĻŋāϰā§āϧāĻžāϰāĻŋāϤ āϧā§āϰā§āĻŦāĻ
Dim d1 As Double
Dim d2 As Double
d1 = InputBox("Enter the length of the side adjacent to the angle: ","Adjacent")
d2 = InputBox("Enter the length of the side opposite the angle: ","Opposite")
Print "The Alpha angle is"; (atn (d2/d1) * 180 / Pi); " degrees"
End Sub