# acosh

acosh(x)

Compute the inverse hyperbolic cosine of `x`

## Examples

1. Calculate the inverse hyperbolic cosine of a real number:

``````julia> acosh(1)
0.0``````

This example calculates the inverse hyperbolic cosine of `1`.

2. Handle complex numbers:

``````julia> acosh(1 + im)
0.0 + 1.5707963267948966im``````

The `acosh` function can handle complex numbers as well. Here, it computes the inverse hyperbolic cosine of `1 + im` and returns a complex result.

3. Calculate acosh for negative real numbers:
``````julia> acosh(-2)
1.3169578969248166 + 3.141592653589793im``````

The `acosh` function can handle negative real numbers. It computes the inverse hyperbolic cosine of `-2` and returns a complex result.

## See Also

acos, acosd, acosh, acot, acotd, acoth, acsc, acscd, acsch, asec, asecd, asech, asin, asind, asinh, atan, atan2, atand, atanh, cos, cosc, cosd, cosh, cospi, cot, cotd, coth, csc, cscd, csch, deg2rad, rad2deg, sin, sinc, sind, sinh, sinpi, tan, tand, tanh,

## User Contributed Notes

### Add a Note

The format of note supported is markdown, use triple backtick to start and end a code block.

*Required Field
Details

Checking you are not a robot: