Texas Instruments TI-89 Developer's Guide

840
Appendix A: System Routines — Math
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
push_trig
Declaration:
void
push_trig
(void (*
proc
) (EStackIndex), EStackIndex
i
)
Category(ies):
Math
Description:
Pushes the corresponding internally-simplified result onto the estack. The
only trigonometric tag that internally-simplified results can contain is
SIN2_TAG or (if IS_COLLECT_KERNELS) TAN_RAD_TAG, both of
whose first arguments are always in radians.
Inputs:
proc
— The address of
push_sin
,
push_cos
, or some other such radian
mode trig pusher subroutine of one EStackIndex argument.
i
— Indexes the top tag of an internally-simplified algebraic
expression, algebraic comparison or aggregate thereof, with
angles measured according to IS_DEGREES versus
IS_RADIANS.
Outputs:
None
Assumptions:
None
Side Effects:
None
Availability:
On AMS 2.02 and higher.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: push_sin, push_cos, push_tan, push_sin2
Example:
If IS_DEGREES and not IS_ARITH_APPROX, and
i
indexes integer 60,
then
push_trig
(
push_sin
,
i
) pushes 1/2.
/* Depending on the arithmetic mode: Pushes tagged 0.5 if IS_DEGREES;
Otherwise pushes –3.0481062110209 or symbolic sin(60).
*/
push_Float (60.0);
push_trig (push_sin, top_estack);

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