#
Fortran Wiki

asin

## Description

`asin(x)`

computes the arcsine of its `x`

(inverse of `sin(x)`

).

## Standard

FORTRAN 77 and later, for a complex argument Fortran 2008 or later

## Class

Elemental function

## Syntax

`result = asin(x)`

## Arguments

`x`

- The type shall be either `real`

and a magnitude that is less than or equal to one or be `complex`

.

## Return value

The return value is of the same type and kind as `x`

. The real part of the result is in radians and lies in the range $-\pi / 2 \leq \asin (x) \leq \pi / 2$.

## Example

```
program test_asin
real(8) :: x = 0.866_8
x = asin(x)
end program test_asin
```

## See also

Inverse function: sin

Revised on April 2, 2016 09:09:50
by

Jason Blevins
(173.88.47.127)
(786 characters / 0.0 pages)