Texas Instruments TI-89 Voyage 200, User Manual

Page: 787 / 1008

Appendix A: Functions and Instructions 787
AndPic
CATALOG
AndPic
picVar [, row, column ]
Displays the Graph screen and logically “ANDS”
the picture stored in
picVar
and the current graph
screen at pixel coordinates
(row, column)
.
picVar
must be a picture type.
Default coordinates are (0,0), which is the upper
left corner of the screen.
In function graphing mode and Y= Editor:
y1(x) = cos(x)
C
@
2 ˆ
Style = 3:Square
„
Zoom = 7:ZoomTrig
ƒ
= 2:Save Copy As...
Type = Picture, Variable = PIC1
y2(x) = sin(x)
@
2 ˆ
Style = 3:Square
y1 = no checkmark (F4 to deselect)
„
Zoom = 7:ZoomTrig
@
"
AndPic PIC1
¸
Done
angle()
MATH/Complex menu
angle(
expression1
)
⇒ ⇒ ⇒ ⇒
expression
Returns the angle of
expression1
, interpreting
expression1
as a complex number.
Note: All undefined variables are treated as real
variables.
In Degree angle mode:
angle(0+2
i
)
¸
90
In Gradian angle mode:
angle(0+3
i
)
¸
100
In Radian angle mode:
angle(1+
i
)
¸
p
4
angle(z)
¸
angle(x+
i
y)
¸
angle(
list1
)
⇒ ⇒ ⇒ ⇒
list
angle(
matrix1
)
⇒ ⇒ ⇒ ⇒
matrix
Returns a list or matrix of angles of the elements
in
list1
or
matrix1
, interpreting each element as a
complex number that represents a two-
dimensional rectangular coordinate point.
In Radian angle mode:
angle({1+2i,3+0i,0
ì
4i})
¸