- 33 -
- 34 -
9-9) Rectangular to polar co-ordinates conversion
Formula : r = x
2
+ y
2
Ex.)Find the length r and angle
θ
in radian when the
point P is shown as x = 1 and y = in the
rectangular coordinates.
.
2
( r )
1.047197551
(
θ
in radian )
2.
( r )
θ
= tan
-1
y ( -180°<
θ
180°)
x
“RAD”
INV X• Y
INV X• Y
INV X• Y
R
•
P
3
1
INV
3
9-7) Miscellaneous functions (FIX, SCI, ENG, FLO)
1.234 +1.234 =
1.23
2.47
2.468
1÷3+1÷3 =
0.33
3.33-01
6.67-01
0.67
0.666666666
123m x 456 = 56088m
56088
= 56.088km
56.088 03
7.8g ÷ 96 = 0.08125g
0.08125
= 81.25mg
81.25 - 03
9-8) Polar to rectangular co-ordinates conversion
Formula : x = r • cos
θ
y = r • sin
θ
Ex.) Find the value of x and y when the point P is shown
as
θ
= 60°and length r = 2 in the polar co-ordinates.
1.
(x)
1.732050808
(y)
1.
(x)
“FIX2”(
•
+
)
INV FIX
•
INV FIX
INV SCI
INV FLO
2
234
1
“FIX2”
“DEG”
(
÷
+
)
INV FIX
•
x
•
÷
=
=
INV FIX
INV ENG
INV
INV
INV
ENG
X• Y
INV X• Y
INV X• Y
P
•
R
2
3
1
•
=
234
123
96
60
456
1
÷
=
3
1
7
2
8
