ATAN

See also A-Z Spreadsheet Function List

Description Returns the arctangent of a number.

Syntax ATAN(number)

number is the tangent of the angle.

Remarks The resulting angle is returned in radians, ranging from -p/2 to p/2. To find the result in degrees, multiply the result by 180/PI().

See Also ATAN2 , ATANH , PI , and TAN functions

Examples ATAN(3.5) returns 1.29

         ATAN(-4) returns -1.33