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 — Sine function Degrees function: ASIND — Arcsine function, degrees