Atan()

Computes the arctangent of a value.

rslt = Atan(real value)

Argument	Contents
value	Any number

A real number equal to the angle in radians (from -p/2 to p/2) whose tangent is value.

Function	Summary
Acos()	Computes the arc cosine of a value
Asin()	Computes the arc sine of a number
Atan2()	Computes the angle between the x-axis and the coordinate x_num, y_num
Tan()	Computes the tangent of an angle expressed in radians