Texas Instruments TI-89 Titanium User Manual

Activities 756
2. Enter vectors describing the initial path of
the boat, water current, and resultant path
of the boat.
Store these vectors as
i, c, and r. Use the
value
a for the unknown speed of the
current. Use the value
b for the speed of
the boat.
Enter:
[20,80¡]!i
[a,0
¡]!c
[b,60°]
!r
Vectors are commonly written in either polar
or rectangular form, so it is useful to convert
polar vectors into rectangular form.
3. Define function
p2r.
Enter:
Define p2r(x)=[x[1,1]*cos(x[1,2]),
x[1,1]*sin(x[1,2])]

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches