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### 6.18 ASIN — Arcsine function

Description:
ASIN(X) computes the arcsine of its X (inverse of SIN(X)).
Standard:
F77 and later
Class:
Elemental function
Syntax:
RESULT = ASIN(X)
Arguments:

 X The type shall be REAL(*), and a magnitude that is less than one.

Return value:
The return value is of type REAL(*) and it lies in the range -\pi / 2 \leq \asin (x) \leq \pi / 2. The kind type parameter is the same as 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 DASIN(X) REAL(8) X REAL(8) F77 and later