6-4 Numeric Functions
REC
Function:
(r coordinate, e coordinate)
Numeric expression
Transforms polar coordinates
(r
, e)
to
rectangular coordinates (x , y ).
Parameter:
r coordinate:
e coordinate:
Explanation:
Numeric expression.
O
<:;;,r
< 10
100
Numeric expression
DEG:
tel<
1440°
RAD: te I< 8
7f
rad
GRA:
tel<
1600 gra
®
1) Transforms polar coordinates
(r
, e)
to
rectangular coordinates (x ,
y)
using
the following relational_ expressions.
x = r cos e
y = r
sine
2) The x coordinate
of
(x ,
y)
will be given
as
the
output
of
the function, and
the value
of
the x coordinate will be assigned
to
variable X and the value
of
they
coordinate will be assigned
to
variable Y at the same time.
3)
An error will occur if r < 0.
4) The
output
values will correspond
to
the setting
of
the angle unit (DEG, RAD
or
GRA).
Example:
10
CLEAR
20
MODE
4
-
~
INPUT
"r
=''
, R
40
INPUT
"t
<
0
l=",
T
50
X=RECCR,Tl
60
PR I
NT"x=''
;X
70
PR I
NT"Y=''
;Y
80
GOTO
30
* (x
,y)
will be displayed
if
(r
, e)
is
input.
153
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