Texas Instruments TI-89 Developer's Guide

382
Appendix A: System Routines — Direct Floating Point Operations
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
cacos
Declaration:
void
cacos
(double
x
, double
y
, double *
u
,
double *
v
)
Category(ies):
Direct Floating Point Operations
Description:
Computes the inverse cosine of the complex number
x + y
†
i
.
Inputs:
x
— A double floating-point value representing the real part of a
complex number.
y
— A double floating-point value representing the imaginary part of a
complex number.
u, v
— Pointers to double variables.
Outputs:
*
u
— The real part of the complex result.
*
v
— The imaginary part of the complex result.
Assumptions:
None
Side Effects:
None
Availability:
All versions of the TI
-
89 / TI
-
92 Plus.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: casin, catan, ccos, csin, ctan
Example:

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA