### Description

Returns the inverse tangent of a value, in radians.

### Sample Usage

`ATAN(0)`

`ATAN(A5)`

`ATAN(1)`

### Syntax

`ATAN(value)`

• `value` - The value for which to calculate the inverse tangent.

### Notes

• The `DEGREES` function can be used to convert the result of `ATAN` into degrees.

• Because tangent is periodic, there are many solutions to the inverse. `ATAN` returns the solution between -Pi/2 and Pi/2.

### By adding the values you would like to calculate, Excellentable generates the outcome:

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`TANH`: Returns the hyperbolic tangent of any real number.

`TAN`: Returns the tangent of an angle provided in radians.

`SINH`: Returns the hyperbolic sine of any real number.

`SIN`: Returns the sine of an angle provided in radians.

`RADIANS`: Converts an angle value in degrees to radians.

`PI`: Returns the value of Pi to 14 decimal places.

`DEGREES`: Converts an angle value in radians to degrees.

`COSH`: Returns the hyperbolic cosine of any real number.

`COS`: Returns the cosine of an angle provided in radians.

`ATANH`Returns the inverse hyperbolic tangent of a number.

`ATAN2`: Returns the angle between the x-axis and a line segment from the origin (0,0) to specified coordinate pair (`x`,`y`), in radians.

`ASINH`: Returns the inverse hyperbolic sine of a number.

`ASIN`: Returns the inverse sine of a value, in radians.

`ACOSH`: Returns the inverse hyperbolic cosine of a number.

`ACOS`: Returns the inverse cosine of a value, in radians.