Question about Casio FX991ES Scientific Calculator

# Pmt Casio fx-991ES pmt - Casio FX991ES Scientific Calculator

Posted by Anonymous on

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Posted on Jan 02, 2017

SOURCE: mode change

Hello,
Just so that we know what we are talking about. The natural display is the display mode in which fractions appear on two lines, radicals appear as radicals, log can be calculated in any base, etc. If that is what you understand by Natural Display, we are in agreement.
To set this mode, you turn calculator ON and press [SHIFT][MODE] (setup). The option is called MathIO, and it has the number 1.
Thus [SHIFT][MODE][1:MathIO].
Hope it helps.

Posted on Oct 13, 2009

Hello,
To avoid errors make sure that the angle unit is THE ONE required by your problem. To verify or to change the angle unit press [SIFT][MODE] and select [3: Deg] for degrees, [4:Rad] for radians, or [5:Grad] for grads.

Convert from rectangular to polar

[SHIFT][+] (Pol) . Screen displays Pol(
You enter the X-coordinate, and the Y coordinate separated by a comma, then you close the parenthesis and press [=].

Exemple: Polar coordinate of the point (1,1)
Pol( 1, 1) gives
r=1.414213562 (square root of 2)
θ=45

Here is how you enter it
Press [SHIFT][MODE][2:LineIO]
[SHIFT][POL] 1 [SHIF] [,] 1 [)] [=]

The screen displays
Pol(1,1)
r= 1.414213562
θ= 45

Convert from polar to rectangular coordinates

Exemple: Recatngular coordinates of (r=3, θ=60°)
[SHIFT][Rec] 3 [SHIFT][,] 60 [ ) ] [=]
The screen displays
Rec(3,60)
X= 1.5
Y= 2.598076211

Hope it helps.

Posted on Nov 15, 2009

Testimonial: "thanx that was very helpful"

SOURCE: i want casio fx-991es result

To convert a single result to decimal, press SD. To have all results come out in decimal, press SHIFT MODE 2 to select LineIO mode.

Posted on Oct 04, 2010

SOURCE: I'm using Casio fx 991ES,

Press SHIFT MODE 2 to switch to LineIO mode.

Posted on Oct 21, 2010

how solve interpolation by casio fx 991 ex

Posted on Nov 28, 2010

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### I use casiofx-991ES,its numbers looking upside down.How can i fix it?

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I know that Staples carry the FX-991ES.

Hope it helps.

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