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186
Parameter:
Explanation:
Function:
Obtains the value of a given argument rounded off at the specified
location.
Parameter:
Explanation:
location.
7-4
Numeric Functions
(r coordinate, 6 coordinate)
©)
Numeric expression
REC
Function:
- Transforms polar coordinates (r , €) to rectangular coordinates (x ,y).
Parameter:
r coordinate:
@ coordinate:
Numeric expression.
0<r < 101°
Numeric expression
DEG: lal < 1440°
RAD: 161 <8 a rad
GRA: |é1< 1600 gra
Explanation:
1) Transforms polar coordinates (7 ,@) to rectangular coordinates (x , y) using
the following relational expressions.
x =rcos@
y=rsiné
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
the y coordinate will be assigned to variable Y at the same time.
3) An error will occur ifr <0.
:
4) The output values will correspond to the setting of the angle unit (DEG, RAD
or GRA).
Example:
1@ CLEAR
2@ MODE
4
30
INPUT
'r=",R
4@
INPUT
"t (°)="
5@ X=REC(R,T)
6@ PRINT*2=";
7@ PRINT*Y="3
8@ GOTO
3a
*(x , y) will be displayed if (7 , 6) is input. .
187
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