Fiamo ECO 30 Benutzerhandbuch Seite 17

Rectangular / Polar coordinates
[2nd] [R►P] converts rectangular coordinates (x,y) to polar coordinates (r, θ).
[2nd] [P ►R] converts polar coordinates (r, θ) to rectangular coordinates (x,y).
Example
Convert rectangular coordina-
tes (14,20) to polar (DEG).
Convert rectangular coordina-
tes (7.5, –10) to polar (RAD).
Convert polar coordinates
(25, 56°) to rectangular.
Convert polar coordinates
(5, 30rad) to rectangular.
Probability
A combination is an arrangement of objects in which order is not important, as in a
hand of cards. [2nd] [nPr] calculates the number of possible combinations of n items
taken r at a time.
A permutation is an arrangement of objects in which the order is important, as in a
race. [2nd] [nCr] calculates the number of possible permutations of n items taken
r at a time.
Example
How many permutations of 4
items can you select out of
a set of numbers of 7 items?
How many combinations of 4
items can you select out of
a set of numbers of 7 items?
Statistics calculation
To enter data for statistical analysis:
1. [2nd] [CSR] clears all statistical data.
2. Select the mode by pressing [∑+] key and make sure "STAT" indictor appears
on the display.
3. [∑+] enters a data point.
4. [2nd] [∑–] removes a data point.
5. [2nd] [FRQ] adds or removes multiple occurrences of a data point. Enter data
point, press [2nd] [FRQ], enter frequency (1~99), press [∑+] to add or [2nd] [∑–]
to remove data points.
Function Key
Press [DRG] to select
„DEG"
14 [2nd] [ ] 20.7 [2nd]
[R ►P] [2nd] [ ]
Press [DRG] to select
„RAD"
7.5 [2nd] [ ] 10 [+/–]
[2nd] [R ►P] [2nd] [ ]
Press [DRG] to select
„DEG"
25 [2nd] [ ] 56 [2nd] [P
►R] [2nd] [ ]
Press [DRG] to select
„RAD"
5 [2nd] [ ] 30 [2nd] [P
►R] [2nd] [ ]
Function Key
7 [2nd] [nPr] 4 [=]
7 [2nd] [nCr] 4 [=]
6–EN
Display
24.98979792 (r)
55.92839019 (θ)
12.5 (r)
–0.927295218 (θ)
13.97982259 (x)
20.72593931 (y)
0.771257249 (x)
–4.940158121 (y)
Display
840.
35.