ATAN2 Function Explained

The ATAN2 function in Microsoft Excel returns the arctangent of the specified x-coordinate and y-coordinate in radians. It is the equivalent of the TAN function, but returns the correct quadrant of the angle. The syntax for the ATAN2 function is ATAN2(x-coordinate, y-coordinate).

ATAN2 Function Syntax

ATAN2(x_num, y_num)

  • x_num: The x-coordinate of the point.
  • y_num: The y-coordinate of the point.