# ASIN

Elemental Intrinsic Function (Generic): Produces the arcsine of an argument.

result = ASIN (x)

x | (Input) Must be of type real, where | x | must be less than or equal to 1, or of type complex.

## Results

The result type and kind are the same as x.

If the result is real, it is expressed in radians and lies in the range - pi/2 <= ASIN (x) <= pi/2.

If the result is complex, the real part is expressed in radians and lies in the range pi/2 <= REAL (ASIN (x)) <= pi/2.

Specific Name | Argument Type | Result Type
--- | --- | ---
ASIN | REAL(4) | REAL(4)
DASIN | REAL(8) | REAL(8)
QASIN | REAL(16) | REAL(16)

## Example

ASIN (0.79345021) has the value 0.9164571.

Parent topic: A to B