Fiamo ECO 30, Руководство пользователя

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6–EN
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 Function Key Display
Convert rectangular coordina-
tes (14,20) to polar (DEG).
Press [DRG] to select
„DEG“
14 [2nd] [ ] 20.7 [2nd]
[R ►P] [2nd] [ ]
24.98979792 (r)
55.92839019 (θ)
Convert rectangular coordina-
tes (7.5, –10) to polar (RAD).
Press [DRG] to select
„RAD“
7.5 [2nd] [ ] 10 [+/–]
[2nd] [R ►P] [2nd] [ ]
12.5 (r)
–0.927295218 (θ)
Convert polar coordinates
(25, 56°) to rectangular.
Press [DRG] to select
„DEG“
25 [2nd] [ ] 56 [2nd] [P
►R] [2nd] [ ]
13.97982259 (x)
20.72593931 (y)
Convert polar coordinates
(5, 30rad) to rectangular.
Press
[DRG]
to select
„RAD“
5 [2nd] [ ] 30 [2nd] [P
►R] [2nd] [ ]
0.771257249 (x)
–4.940158121 (y)
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 Function Key Display
How many permutations of 4
items can you select out of
a set of numbers of 7 items?
7 [2nd] [nPr] 4 [=]
840.
How many combinations of 4
items can you select out of
a set of numbers of 7 items?
7 [2nd] [nCr] 4 [=]
35.
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.