Returns the inverse tangent (the arctangent) for specified x and y coordinates.

ATAN2(x_coord; y_coord)

x_coord is the value of the x coordinate.y_coord is the value of the y coordinate.ATAN2 returns the inverse trigonometric tangent, that is, the angle (in radians) between the x-axis and a line from point x_coord, y_coord to the origin. The angle returned is between -PI and PI.To return the angle in degrees, use the DEGREES function.

ATAN2(20; 20)

returns 0.785398163397448 (PI/4 radians).

DEGREES(ATAN2(12.3; 12.3))

returns 45. The tangent of 45 degrees is 1.

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