This function calculates the arctangent, that is, the angle whose tangent is the specified value.

Syntax

ATAN(value)

Arguments

For the argument, specify the tangent of the angle you want to return, which must be a value between –1 and 1.

Remarks

The result angle is in radians between –PI/2 and PI/2. If you want to convert the result to degrees, multiply the result by 180/PI.

Data Types

Accepts numeric data. Returns numeric data.

Examples

ATAN(B3)

ATAN(R3C2)

ATAN(1) gives the result 0.7853981634