Texas Instruments TI-89 Developer's Guide

372
Appendix A: System Routines — Direct Floating Point Operations
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
atan2
Declaration:
double
atan2
(double
y
, double
x
)
Category(ies):
Direct Floating Point Operations
Description:
Computes the inverse tangent of
y
/
x
.
Inputs:
y, x
— Double floating-point values.
Outputs:
Returns the inverse tangent of
y
/
x
in radian measure.
Assumptions:
None
Side Effects:
None
Availability:
All versions of the TI
-
89 / TI
-
92 Plus.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: acos, asin, atan, cos, sin, tan
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