Sunlit Design > The Sun API > Documentation > sdATan Function
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sdATan Function
Description
Returns the arctangent of a number. The arctangent is the angle whose tangent isValue.
The returned angle is given in degrees in the range -90 to 90.
Syntax
sdATan(Value)
Value A double precision number, is the tangent of
the angle you want.
Return Values
sdATan returns a double precision number.Errors
If this function finds any errors in it's input parameter(s) it returns -99999999
Remarks
This degree based function is provided because most programming environments provide only radian based functions.
You can convert a degree value to it's Degrees:Minute:Seconds components using the sdDUnpackx function and to a printable text format using sdD2Text function.
Example
To find the angle which has a tangent of -.5:
sdATan(-.5) equals -26.565051177077979...