ATAN

The ATAN function returns the arctangent, or inverse tangent, of a number. It is commonly used in trigonometry and geometry to calculate angles based on the tangent of a right-angled triangle's sides.

Syntax

=ATAN(number)

number The tangent for which to find the arctangent.
notes The ATAN function returns the angle in radians which can be converted to degrees by multiplying by (180/π) or using the RADIANS and DEGREES functions.

About ATAN

When you're dealing with angles and need to invert the tangent to find an angle based on the tangent of sides of a right-angled triangle, ATAN in Excel is the go-to tool. It's widely used in trigonometry, geometry, and various mathematical applications to determine angles based on the tangent of the sides of a right-angled triangle. The function returns the arctangent of a number, providing the angle in radians, which can be converted to degrees, if necessary. ATAN facilitates precise angle calculations, allowing for accurate geometric and trigonometric analysis within Excel.

Examples

To find the arctangent of 0.5, you would use the formula: =ATAN(0.5)

If the tangent of an angle θ is 0.75, you can find the angle in radians using: =ATAN(0.75)

For the tangent value of -1, you can calculate the arctangent by entering: =ATAN(-1)

Questions

What does the ATAN function return?

The ATAN function returns the arctangent of a number in radians, representing the angle whose tangent is the specified number.

How can I convert the result of the ATAN function to degrees?

To convert the angle from radians to degrees, you can multiply the result of the ATAN function by (180/π) or use the RADIANS and DEGREES functions in Excel.

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