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- ASIN(3I) Last changed: 4-13-99
-
-
- NNAAMMEE
- AASSIINN, DDAASSIINN, QQAASSIINN, AASSIINNDD, DDAASSIINNDD, QQAASSIINNDD - Computes arc sine (inverse
- sine)
-
- SSYYNNOOPPSSIISS
- AASSIINN (([XX==]_x))
- DDAASSIINN (([XX==]_x))
- QQAASSIINN (([XX==]_x))
-
- AASSIINNDD (([XX==]_x))
- DDAASSIINNDD (([XX==]_x))
- QQAASSIINNDD (([XX==]_x))
-
- IIMMPPLLEEMMEENNTTAATTIIOONN
- UNICOS, UNICOS/mk, IRIX systems
-
- CF90, MIPSpro 7 Fortran 90, MIPSpro Fortran 77
-
- SSTTAANNDDAARRDDSS
- Fortran
-
- Fortran extensions: QQAASSIINN, AASSIINNDD, DDAASSIINNDD, QQAASSIINNDD
-
- DDEESSCCRRIIPPTTIIOONN
- AASSIINN, DDAASSIINN, and QQAASSIINN return the arc sine in radians. AASSIINNDD, DDAASSIINNDD,
- and QQAASSIINNDD return the arc sine in degrees.
-
- AASSIINN and AASSIINNDD 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.
-
- Vector versions of these intrinsics exist on some systems. Vector
- versions of AASSIINN and DDAASSIINN exist on UNICOS and UNICOS/mk systems. On
- UNICOS/mk systems, the vector versions of these intrinsics are used
- when --OO vveeccttoorr33 or --OO33 have been specified on the compiler command
- line. On UNICOS/mk systems, the 64-bit intrinsic vectorizes; the
- 32-bit version does not. A vector version of the single-precision and
- double-precision AASSIINN intrinsic exists on IRIX systems and is used
- when --OO33 is specified on the compiler command line.
-
- These functions evaluate _y = arcsin(_x).
-
- NNOOTTEESS
- The AASSIINN and DDAASSIINN intrinsic function names can be passed as
- arguments; the others cannot.
-
- On CRAY T90 systems that support IEEE arithmetic, the following return
- values occur:
-
- AASSIINN((_x)) = NaN if |_x| > 1.0 or _x = NaN
-
- RREETTUURRNN VVAALLUUEESS
- The data type and kind type for single precision, double-precision,
- and quad-precision values differ depending on your platform. For
- platform-specific information, see the TERMINOLOGY section of the
- IINNTTRROO__IINNTTRRIINN(3I) man page.
-
- For AASSIINN, DDAASSIINN, and QQAASSIINN, the result is in radians and is in the
- range -pi/2 <= _r_e_s_u_l_t <= pi/2. For AASSIINNDD, DDAASSIINNDD, and QQAASSIINNDD, the
- result is in degrees and is in the range -90 <= _r_e_s_u_l_t <= 90.
-
- AASSIINN and AASSIINNDD return the real arc sine of their real arguments.
-
- DDAASSIINN and DDAASSIINNDD return the double-precision arc sine of their
- double-precision arguments.
-
- QQAASSIINN and QQAASSIINNDD return the quad-precision arc sine of their
- quad-precision arguments.
-
- SSEEEE AALLSSOO
- _I_n_t_r_i_n_s_i_c _P_r_o_c_e_d_u_r_e_s _R_e_f_e_r_e_n_c_e _M_a_n_u_a_l for the printed version of this
- man page.
-