@ATan (Formula Language)
Calculates the arc (inverse) tangent using the tangent of an angle.
Syntax
@ATan( tangent )
Parameters
tangent
Number or number list. The tangent of an angle.
Return value
angle
Number or number list. An angle, in radians, from -pi/2 through pi/2. This represents an angle between -90 and 90 degrees.
Usage
If the parameter is a list, the function operates on each element of the list, and the return value is a list with the same number of elements.
Examples
- This example returns pi/4.
@ATan( 1 ) - This example returns -pi/4.
@ATan( -1 ) - This example returns 1.10715 radians (63.4 degrees).
@ATan( 2 ) - This example returns pi/4, -pi/4, and 1.10715 radians in a list
@ATan( 1 : (-1) : 2 )