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Copyright © Lexibook 007
ENGLISH
4. TRIGONOMETRIC FUNCTIONS
Value
π
[SHIFT] [
π
]
Displays the approximate value of the constant
π
, with
ten significant numbers, thus 3,141592654
Note :
in order to be more precise in its calculations, the calculator uses a
value
π
having 12 significant numbers, thus 3,14159265359.
E.g.:
Perimeter and maximum surface area of a Formula 1 wheel, the maximum
diameter being 660mm.
We calculate the radius (diameter divided by 2) expressed in meters, then
we apply the formulas 2
π
r et
π
r
:
660 [÷] 2 [÷] 1000 [=]
->
660÷2÷1000
| 0.33
[SHIFT][STO] [Y]
->
660÷2÷1000->Y
| 0.33
The value of the radius is saved in memory.
2 [SHIFT] [
π
] [ALPHA] [Y] [=]
->
2
π
Y
|
2.073451151
[SHIFT] [
π
] [ALPHA] [Y] [X
] [=]
->
π
Y
|
0.34211944
The perimeter is thus 2,1 m and the surface area 0,34 m
.
Comment:
the multiplication is implicit, it was thus not necessary to press
the [x] key.
Angle Units
Angle units and conversions
[MODE] [MODE] [MODE] 1
[MODE] [MODE] [MODE] 2
[MODE] [MODE] [MODE] 3
[SHIFT] [DRG ] 1
(or 2 or 3)
Degrees
is activated as the angle unit.
The symbol
D
is displayed.
Radians
is activated as the angle unit.
The symbol
R
is displayed
Grads is activated as the angle unit. The
symbol
G
is displayed.
Conversion of the angle unit input in
degrees (or radians or grads) into the
activated angle unit.
Note :
the setting remains set if the calculator is turned off and on again. Be
sure to check the angle unit activated before carrying out your calculation!
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20/6/07 15:28:08