The ATAN function in Google Sheets is a mathematical function that computes the arctangent, or inverse tangent, of a specified number. This function is particularly useful in trigonometry, allowing users to determine the angle whose tangent is the provided value. The result is expressed in radians, making it suitable for further calculations in various mathematical and scientific applications.

Syntax

ATAN(value)

• value: The numeric value for which you want to find the arctangent.

Example #1

=ATAN(1)

This function calculates the arctangent of 1, which equals 0.7854 radians (or 45 degrees).

Example #2

=ATAN(0)

This returns the arctangent of 0, resulting in 0 radians, indicating an angle of 0 degrees.

Example #3

=ATAN(-1)

This computes the arctangent of -1, yielding approximately -0.7854 radians (or -45 degrees), showing the angle in the fourth quadrant.

Error handling

• NUM!: This error occurs if the input value is non-numeric, indicating that the function cannot compute the arctangent for such a value.
• VALUE!: This error indicates that the function’s input is not a valid number type, preventing calculation.

Conclusion

In summary, the ATAN function is a powerful mathematical tool in Google Sheets that enables users to find the arctangent of a given value in radians. Mastery of this function can enhance your analytical capabilities, especially in fields requiring trigonometric calculations, such as engineering and physics.