ASIN — Arcsine function¶

ASIN(X)¶

ASIN(X) computes the arcsine of its X (inverse of SIN(X) ).

Parameters: X – The type shall be either REAL and a magnitude that is less than or equal to one - or be COMPLEX.
Returns: 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 Re asin(x) leq pi/2.

Standard:: Fortran 77 and later, for a complex argument Fortran 2008 or later
Class:: Elemental function

Syntax:

RESULT = ASIN(X)

Example:

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

Specific names:

Name	Argument	Return type	Standard
`ASIN(X)`	`REAL(4) X`	`REAL(4)`	Fortran 77 and later
`DASIN(X)`	`REAL(8) X`	`REAL(8)`	Fortran 77 and later

See also:

Inverse function: SIN Degrees function: ASIND