ATAN

Returns the arctangent of a number. The arctangent is the angle whose tangent is number. The returned angle is given in radians in the range -p/2 to p/2.

Syntax

ATAN(number)

Number   is the tangent of the angle you want.

Remarks

To express the arctangent in degrees, multiply the result by 180/PI( ).

Examples

ATAN(1) equals 0.785398 (p/4 radians)

ATAN(1)*180/PI() equals 45 (degrees)