Question about Casio FX991ES Scientific Calculator

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There is nothing to convert, because if T is a real number so is 40sin(4000T).

40sin(4000T)=40abs(sin(4000T))*sign(sin(4000T))

where **abs()** is the absolute value of it argument, and sign(sin(4000T)) is positive or negative.

So in (radius, angle) polar coordinates

r= 40 abs(sin(4000T)),

theta =(0, or PI), depending on sign(sin(4000T))

If you are trying to graph parametric functions, this calculator does not do graphs, and you need another function of T

Posted on Dec 27, 2013

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Posted on Jan 02, 2017

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SOURCE: canverying polar to rectangular

Hello,

Here are exemples from the manual.

Posted on Sep 25, 2009

SOURCE: can't transform from polar to rectangular

Hello,**The e is the same, it is the exponential**. According to Euler's relation**e^(i theta) = cos(theta) + i sin(theta),** where** i** is the imaginary unit.

When represented on the complex plane (x,iy) the point (cos(theta), sin(theta)) is at the extremity of a vector of length 1 and making an angle theta with the real axis.

In (plane) polar coordinates, a point is defined by the radius r, and the angle, theta, it makes with the x axis, measured in the trigonometric (counterclockwise) direction. It is structurally equaivalent to representing it in the complex plane as r*e^(i*theta). Since r is the measure ot is radius, and the theta is it argument (angle). The complex notation is used for its convenience when adding vectors (as is AC circuits)

That is the theory.

I am inserting a clipping from the book to show you how to convert between polar and rectangular coordinates.

Posted on Oct 16, 2009

SOURCE: How to convert polar to rectangular form

Hello,

Press [MODE] and select [1:COMP]

Press [SHIFT][MODE] and select [3:Deg]. You can also use rad if the angle you are given is in radians.

To start the conversion

Press [SHIFT][-] (Rec) screen displays **Rec(**

Key in the radius r , ex: 3 screen displays **Rec(3**Press [SHIFT][)] (,) to enter comma separator

Screen displays

Y=2.524532346

If angle is in radians, [SHIFT] [MODE][4:Rad] the command

Rec(3, Pi) gives X=-3, Y=0

Hope it helps

Posted on Oct 18, 2009

SOURCE: can you show how to convert pola to rectangular o

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= 1.414213562θ= 45 **

Rec ( radius, angle) =

Exemple: Recatngular coordinates of (r=3, θ=60°)

The screen displays

X= 1.5

Y= 2.598076211

Hope it helps.

Posted on Nov 15, 2009

Testimonial: *"thanx that was very helpful"*

SOURCE: i am a casio fx-82MS user. i would like to know

Hello,

Press [MODE] and select [1:COMP]

Press [SHIFT][MODE] and select [3:Deg]. You can also use rad if the angle you are given is in radians.

To start the conversion

Press [SHIFT][-] (Rec) screen displays **Rec(**

Key in the radius r , ex: 3 screen displays **Rec(3**Press [SHIFT][)] (,) to enter comma separator

Screen displays

Y=2.524532346

If angle is in radians, [SHIFT] [MODE][4:Rad] the command

Rec(3, Pi) gives X=-3, Y=0

I just realized that your question pertains to the FX82MS but is listed under the FX115ES (That is quite a difference) So my answer above does not concern you but I will leave it as is should anyone need the answer for the FX115ES.

Look at the enclosed screen capture for the FX82MS

Posted on Nov 16, 2010

To convert a complex number (not an equation) from rectangular coordinates to polar coordinates you do as follows

2+3[OPTN][ F3 (CLPX)][F1(i)][F6 >][F3> r ,theta][EXE]

2+3[OPTN][ F3 (CLPX)][F1(i)][F6 >][F3> r ,theta][EXE]

Nov 08, 2014 | Casio CFX-9850G Plus Calculator

See cap image below

May 28, 2014 | Office Equipment & Supplies

If one or both numbers are in polar form, convert it/them to rectangular. Once both numbers are in rectangular form, simply add the two components separately: Add the two x components together, and add the two y components together.

If you're asking how to do this on a particular calculator, please specify the make and model.

If you're asking how to do this on a particular calculator, please specify the make and model.

Oct 15, 2013 | Office Equipment & Supplies

At first, **Rect** and **Polar** are a display-format instructions, not a conversion functions. Polar instruction displays complex value in rectangular form **a + bi**. The complex value can have any complex form. __However, an__** r*exp(i*theta)** causes an eror in Degree angle mode according to the TI avowal. See captured images below

Sep 06, 2012 | Texas Instruments TI-84 Plus Calculator

In Run screen, Press OPTN, Press F6> repeatedly until you see the ANGL TAB. Press F6> again (once or twice). You will see the TAB Pol( and Rec(

To convert from Rectangular coordinates to Polar press POL(, type in the x and y coordinates then EXE

Example: F1: Pol(1,1) gives (1.314213562, 45)

F2: Rec(square root (2), 45) gives (1,1)

Make sure the angle unit is set to the one you need (degree or radian).

To convert from Rectangular coordinates to Polar press POL(, type in the x and y coordinates then EXE

Example: F1: Pol(1,1) gives (1.314213562, 45)

F2: Rec(square root (2), 45) gives (1,1)

Make sure the angle unit is set to the one you need (degree or radian).

Apr 19, 2012 | Casio Algebra FX 2.0 Calculator

Conversion of polar form to rectangular:

- Switch to CMPLX mode: [MODE] [2]
- Enter complex number in polar form, e.g. r = 3, θ = 42°: 3 [SHFT] [(-)] 42 [=]
- Switch to rectangular view: [SHFT] [2] [4]

- Switch to CMPLX mode: [MODE] [2]
- Enter complex number in rectangular form, e.g. real part = 2, imag part = 3: 2 [+] 5 [ENG] [=]
- Switch to polar view: [SHFT] [2] [3]

Jan 12, 2011 | Casio FX991ES Scientific Calculator

Use the >Rec and >Pol commands. They're in the Complex number menu, accessible through 2nd [CPLX] MORE.

[CPLX] is the shifted function of the 9 key.

[CPLX] is the shifted function of the 9 key.

Dec 10, 2010 | Texas Instruments TI-86 Calculator

You can switch the display mode for complex numbers by pressing SHIFT MODE down 3 and picking one. This will display the current result in the selected mode.

You can also override the current display mode and specify the format. Add these keystrokes at the end of a calculation: SHIFT 2 then 3 for polar or 4 for rectangular.

You can also override the current display mode and specify the format. Add these keystrokes at the end of a calculation: SHIFT 2 then 3 for polar or 4 for rectangular.

Nov 24, 2010 | Casio FX-115ES Scientific Calculator

Hello,

Press [MODE] and select [1:COMP]

Press [SHIFT][MODE] and select [3:Deg]. You can also use rad if the angle you are given is in radians.

To start the conversion

Press [SHIFT][-] (Rec) screen displays**Rec(**

Key in the radius r , ex: 3 screen displays**Rec(3**

Press [SHIFT][)] (,) to enter comma separator **Rec(3,**

Key in the angle in degrees, ex: 57.3; screen displays **Rec(3,57.3**

Press ) to close parentheses; screen displays **Rec(3, 57.3)**

Press [=]

Screen displays

**Rec(3, 57.3)**

**X=1.620720961**

Y=2.524532346

X and Y are the values of the coordinates. ** **

If angle is in radians, [SHIFT] [MODE][4:Rad] the command

Rec(3, Pi) gives X=-3, Y=0

Hope it helps

Press [MODE] and select [1:COMP]

Press [SHIFT][MODE] and select [3:Deg]. You can also use rad if the angle you are given is in radians.

To start the conversion

Press [SHIFT][-] (Rec) screen displays

Key in the radius r , ex: 3 screen displays

Screen displays

Y=2.524532346

If angle is in radians, [SHIFT] [MODE][4:Rad] the command

Rec(3, Pi) gives X=-3, Y=0

Hope it helps

Oct 18, 2009 | Casio FX-115ES Scientific Calculator

This is an example, plug in your problem.

Convert 12 - 42*j* to polar form
(*r* ∠ q).

For**CASIO** calculator...

**Keystrokes**
**Display**
12
12
12
42
42
-42
43.68065934 (=
*r*)
-74.0546041 (= θ)
Therefore,

Complex number in rectangular form: 12 - 42*j*
Same complex number in
**polar** form:
43.7 ∠ -74°

Convert 12 - 42

For

Complex number in rectangular form: 12 - 42

Feb 29, 2008 | Computers & Internet

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