ATAND

ATAND returns a real floating-point value that is an approximation of the inverse (arc) tangent in degrees of x or of a ratio x/y.

>>-ATAND(x-+----+-)--------------------------------------------><
           '-,y-'     

x and y

Expressions.

If x alone is specified it must be real. The result has the base and precision of x, and is in the range:

  -90 < ATAND(x) < 90

If x and y are specified, each must be real. The value of the result is given by:

For argument requirements and attributes of the result, see ATAN.