Casio fx-85EX - Frequently Asked Questions

Rec(r, θ)
0 ≦ r ≦ 9.999999999 × 10
99
θ: Same as sinx
°’ ”
|a|, b, c < 1 × 10
100
; 0 ≦ b, c
The display seconds value is subject to an error of ±1 at
the second decimal place.
°’ ”
|x| < 1 × 10
100
Decimal ↔ Sexagesimal Conversions
0°0’0” ≦ |x| ≦ 9999999°59’59”
x
y
x > 0: -1 × 10
100
< ylogx < 100
x = 0: y > 0
x < 0: y = n,
𝑚
2𝑛 + 1
(m, n are integers)
However: -1 × 10
100
< ylog |x| < 100
𝑦
𝑥
y > 0: x ≠ 0, -1 × 10
100
< 1/x logy < 100
y = 0: x > 0
y < 0: x = 2n+1,
2𝑛 + 1
𝑚
(m ≠ 0; m, n are integers)
However: -1 × 10
100
< 1/x log |y| < 100
a
b
/
c
Total of integer, numerator, and denominator must be 10
digits or less (including separator symbol).
RanInt#(a, b) a < b; |a|, |b| < 1 × 10
10
; b − a < 1 × 10
10
• Precision is basically the same as that described under “Calculation
Range and Precision”, above.
• x
y
, 𝑦
𝑥
,
3
, x!, nPr, nCr type functions require consecutive internal
calculation, which can cause accumulation of errors that occur with each
calculation.
• Error is cumulative and tends to be large in the vicinity of a function’s
singular point and inflection point.
• The range for calculation results that can be displayed in π form when
MathI/MathO is selected for Input/Output on the setup menu is |x| < 10
6
.
Note, however, that internal calculation error can make it impossible to
display some calculation results in π form. It also can cause calculation
results that should be in decimal form to appear in π form.
Specications
Power Requirements:
fx-82EX: AAA-size battery R03 (UM-4) × 1
fx-350EX: AAA-size battery LR03 (AM4) × 1
fx-85EX: Built-in solar cell; button battery LR44 × 1
Approximate Battery Life (based on one hour of operation per day):
fx-82/85EX: 2 years
fx-350EX: 1 year
Power Consumption: 0.0006 W (fx-82/350EX)
Operating Temperature: 0°C to 40°C (32°F to 104°F)
Dimensions:
fx-82/350EX: 13.8 (H) × 77 (W) × 165.5 (D) mm
1
/
2
” (H) × 3” (W) × 6
1
/
2
” (D)
fx-85EX: 11.1 (H) × 77 (W) × 165.5 (D) mm
3
/
8
” (H) × 3” (W) × 6
1
/
2
” (D)
21