The ATAN2 function in Excel is used to calculate the arctangent of the ratio of the specified x- and y-coordinates, and returns the angle in radians. This function is helpful when working with trigonometric calculations or when calculating angles between points.

**How to use ATAN2() Function in excel:**

To use the ATAN2 function in Excel, follow these steps:

- Select the cell where you want to display the result.
- Type the following formula into the formula bar: =ATAN2(y,x), where “y” and “x” are the coordinates of the point.
- Press Enter to calculate the result.
- The result will display in the selected cell.

### Here are examples of using the ATAN2 function in Excel:

- =ATAN2(1, 2) returns 0.463647609 (radians)
- =ATAN2(-1, 2) returns -0.463647609 (radians)
- =ATAN2(1, -2) returns 2.677945045 (radians)
- =ATAN2(-1, -2) returns -2.677945045 (radians)
- =ATAN2(0, 1) returns 0 (radians)
- =ATAN2(1, 0) returns 1.570796327 (radians)
- =ATAN2(-1, 0) returns -1.570796327 (radians)
- =ATAN2(0, -1) returns 3.141592654 (radians)
- =ATAN2(3, 4) returns 0.643501109 (radians)
- =ATAN2(-3, -4) returns -2.498091544 (radians)

### Here are some similar functions to the ATAN2 function in Excel:

- ATAN Function: The ATAN function in Excel is use to calculate the arctangent of a given number, and returns the angle in radians. Unlike the ATAN2 function, it takes only one argument.
- TAN Function: The TAN function in Excel is use to calculate the tangent of a given angle, which is the ratio of the opposite and adjacent sides of a right-angled triangle. It takes one argument in radians.
- COS Function: The COS function in Excel is use to calculate the cosine of a given angle, which is the ratio of the adjacent side to the hypotenuse of a right-angled triangle. It takes one argument in radians.
- SIN Function: The SIN function in Excel is use to calculate the sine of a given angle, which is the ratio of the opposite side to the hypotenuse of a right-angled triangle. It takes one argument in radians.
- ATANH Function: The ATANH function in Excel is used to calculate the inverse hyperbolic tangent of a given number, and returns the angle in radians. It takes only one argument.

### FAQ’s for uses of ATAN2 function in excel

**What is the difference between ATAN and ATAN2?**

ATAN function calculates the arctangent of a given number, while ATAN2 function takes two arguments representing the x and y coordinates of a point and calculates the angle between the positive x-axis and the point.

**What is the range of values that ATAN2 function can return?**

The ATAN2 function returns values in radians, which range from -π to π.

**Can the ATAN2 function return a negative value?**

Yes, the ATAN2 function can return a negative value, which indicates an angle in the opposite direction from the positive x-axis.

**Can the ATAN2 function handle errors or invalid arguments?**

If the arguments given to the ATAN2 function are invalid, such as if they are text or empty cells, the function returns a #VALUE! error.

**What are some common applications of the ATAN2 function?**

The ATAN2 function is commonly used in engineering, physics, and mathematics to calculate the angle between two points, or to find the direction of an object relative to a reference point.

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