# ACOS

### Description

Returns the inverse cosine of a value, in radians.

### Sample Usage

`ACOS(0)`

`ACOS(A2)`

`ACOS(1)`

### Syntax

`ACOS(value)`

`value`

- A value between`-1`

and`1`

, inclusive for which the inverse cosine is calculated.

### Notes

The

`DEGREES`

function can be used to convert the result of`ACOS`

into degrees.Because cosine is periodic, there are multiple solutions to the inverse.

`ACOS`

returns the solution between 0 and Pi.

### Step 1: To use the ACOS Formula, simply begin with your edited Excellentable:

### Step 2: Then begin typing the ACOS formula in the area you would like to display the outcome:

### Step 3: By adding the values you would like to calculate, Excellentable generates the outcome:

### See Also

`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.

`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.

`ATAN`

: Returns the inverse tangent of a value, 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.

`ATANH`

: Returns the inverse hyperbolic tangent of a number.