Calculate the arctangent using x- and y-coordinates.

`ATAN2(x_num, y_num)`

- y - the arctangent of x
- x - the x-coordinate of the point where the tangent is to be found

`=DEGREES(ATAN2(x,y))`

The ATAN2 function takes two arguments and returns the angle between the two points. This angle is returned as a radian. To get the angle in degrees, use the formula

`=ATAN2(x,y)*180/PI()`

The formula above gives the angle in degrees.

The ATAN2 function is used to calculate the arctangent of a point in radians, which is the angle from the x-axis to a line connecting the origin (0, 0) to the point (x_num, y_num). The result is a value between -pi and pi.

- The ATAN2 function calculates the arctangent of a point using the x- and y-coordinates, and returns the angle in radians.
- The ATAN2 function returns a negative angle if the y-value is negative.

The ATAN2 function calculates the arctangent of its arguments. This arctangent is the inverse tangent of the arguments, and is the angle from the x-axis to a line that contains the origin and the point (x_num, y_num). The angle that ATAN2 returns is in radians, and is between -pi and pi, excluding -pi.

The x_num and y_num arguments are required for the ATAN2 function, and these are the coordinates of the point to analyze.

ATAN2 can be expressed in terms of ATAN, where ATAN2(a,b) equals ATAN(b/a). It can also be expressed in degrees by multiplying by 180/PI(), or by using the DEGREES function.

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