ATAN

Formulas / ATAN
Calculate the arctangent of a number.
`=ATAN(number)`
• number - the tangent of the angle to calculate

Examples

• `=ATAN(3/3)`

The ATAN function is used to calculate the arctangent of a given number, in either radians or degrees. For example, to calculate the arctangent of 3/3, you can use the above formula. This will return 0.785 radians.

• `=ATAN(1)*180/PI()`

This formula calculates the arctangent of 1 in degrees, and will return 45 degrees.

• `=DEGREES(ATAN(1))`

Another way to calculate the arctangent of 1 in degrees is to use the DEGREES function in combination with the ATAN function, and will also return 45 degrees.

Summary

The ATAN function calculates the arctangent of a number, which is the inverse tangent of the input number and the angle whose tangent is the input number.

• The ATAN function calculates the arc-tangent of a number, which is the inverse of TAN.
• The ATAN function can be used to compute the angle of a point in the Cartesian Coordinate System.

What is the ATAN function?
The ATAN function is the inverse of the TAN function. It returns the angle of a right-triangle from the ratio of the opposite side over the adjacent side of the triangle.
What is the ATAN function used for?
The ATAN function is useful for getting the angle for a Cartesian Coordinate point.
What is the range of the ATAN function?
The ATAN function has a limited range from -pi/2 to pi/2.
Are there any other uses for the ATAN function?
Yes, the ATAN function can also be used for:
• Calculating the angle of any two points on a circle
• Calculating the angle between two lines
• Calculating the angle of a triangle