asin(3I)

NAME
     ASIN, DASIN, QASIN, ASIND, DASIND, QASIND - Computes arc sine (inverse
     sine)

SYNOPSIS
     ASIN ([X=]x)
     DASIN ([X=]x)
     QASIN ([X=]x)

     ASIND ([X=]x)
     DASIND ([X=]x)
     QASIND ([X=]x)

STANDARDS
     Fortran

     Fortran extensions:  QASIN, ASIND, DASIND, QASIND

DESCRIPTION
     ASIN, DASIN, and QASIN return the arc sine in radians.  ASIND, DASIND,
     and QASIND return the arc sine in degrees.

     ASIN and ASIND are generic function names; the others are specifics.
     These are elemental intrinsic functions.  They accept the following
     argument:

     x         Must be type real.  The type and kind type of x is identical
               to the type and kind type of the return value.  The absolute
               value of x must be <= 1.  See the RETURN VALUES section for
               information on input data types and return values.

     A vector version of the single-precision and double-precision ASIN
     intrinsic exists and is used when -O3 is specified on the compiler
     command line.

     These functions evaluate y = arcsin(x).

NOTES
     The ASIN and DASIN intrinsic function names can be passed as
     arguments; the others cannot.

RETURN VALUES
     The terms single precision, double precision, and quad precision
     differ depending on your platform.  For platform-specific information,
     see the TERMINOLOGY section of the INTRO_INTRIN(3I) man page.

     For ASIN, DASIN, and QASIN, the result is in radians and is in the
     range -pi/2 <= result <= pi/2.  For ASIND, DASIND, and QASIND, the
     result is in degrees and is in the range -90 <= result <= 90.

     ASIN and ASIND return the real arc sine of their real arguments.

     DASIN and DASIND return the double-precision arc sine of their
     double-precision arguments.

     QASIN and QASIND return the quad-precision arc sine of their
     quad-precision arguments.