ASIN — Arcsine function

Description

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

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 \Re \asin(x) \leq \pi/2.

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

Standard

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

Class

Elemental function

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