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# How do I enter polar form complex numbers in Algebra fx 2.0 plus?

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Posted on Jan 02, 2017

You can perform coordinate conversions in the COMP, STAT, MATRIX and VECTOR Modes.
Angle unit may be in either degree or radian.

To convert from rectangular to polar, (SQRT(2)/2,SQRT(2)/2)

Press [SHIFT] [+] (Pol)
Screen displays Pol(
Type in SQRT2
Use right arrow to move cursor out of radical
Type in /2 [SHIFT] [,]
Type in SQRT2
Use right arrow to move cursor out of radical
Type in /2
Close the right parenthesis
Screen displays Pol (SQRT2 /2, SQRT2 / 2)
Press [=]. Display echoes the command on top line and result in bottom line as r=1, theta =45, (if unit is in degree) or theta = 0.7853981634 if unit is radian.

To convert from polar to rectangular coordinates
Note: You cannot use the answer memory to convert back to rectangular because the calculator will use the r-value only. So you will have to enter the radius AND the angle.

ex: Rec(1,45)
Angle must be in degree
Press [SHIFT][-] (Rec)
Screen display Rec(
Type in 1 [SHIFT] (,) 45 [)] [=]
Calculator displays X=0.7071067812, Y=0.7071067812
If you press the SD key hoping to convert the decimals to radicals, the calculator will not do it.

As to the "confusion", I have found none.
After you finish entering the argument of a square root, use the right arrow to move cursor out of under the root symbol to signify that the argument is complete. If you use a left parenthesis inside the root, you must insert the matching right parenthesis inside the root, then move cursor outside the root.

This is how the calculator behaves, and I am not expressing an opinion on how simple or complicated that is. I assume that to make full use of the calculator capabilities, one has to converse with it, using the syntax it understands.

Posted on Mar 31, 2010

how can i enter a polar form number with angle to convert into a complex numbe(a+bi)

Posted on Jan 14, 2011

I checked the manual for the ALGEBRA FX2.0 PLUS looking for that type of error. It is not listed. Maybe you are talking about another calculator?
Here is the link to the appendix of the manual. Part1 lists the error messages.
You can always try to reset the calculator by pressing the RESET button at the back, or use the menu icon System or Memory.

Posted on May 29, 2011

Set the calculator to polar form, then simply enter the radius, press the comma key, then enter the angle (in whatever angular mode you've specified).
Full details are in Chapter 2 of the manual you can download from here.

Posted on Oct 26, 2011

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### Complex polar angle scientific

{r, theta} is equivalent to r*exp(i*theta)=r*cos(theta) +i*sin(theta)
That is all you need.

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### I want to solve an complex equation on casio fx-570 ES Plus

Your scientific calculator is unable to solve complex equation with complex coefficients. You should try to solve by hand directly using the quadratic formula or by factoring the polynomial in z
failing that, another way would be to set z=x+iy, substitute this for z, carry out the algebra and try to separate real and imaginary parts. But your two equations will constitute a system of two quadratic equations. I am not aware of any general method to solve coupled nonlinear equations.
Good luck.

Dec 20, 2012 | Casio FX-115ES Scientific Calculator

### I need to convert the rectngular form to polar form , so how can i do that ?

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).

Apr 19, 2012 | Casio Algebra FX 2.0 Calculator

### How can i enter a polar form number with angle to convert into a complex numbe(a+bi)

Set the calculator to polar form, then simply enter the radius, press the comma key, then enter the angle (in whatever angular mode you've specified).
Full details are in Chapter 2 of the manual you can download from here.

Oct 25, 2011 | Office Equipment & Supplies

### Conversion of polar to rectangular form and vice versa

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]
Conversion of rectangular to polar:
• 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

### Converting between Forms When working with phasors it is often necessary to convert between rectangular and polar form. To convert from rectangular form to polar form: M = sqrt{A^2 + B^2} f =...

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.

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

### How would u get the caculater to do a square root problem like give i the real anwser

Turn calculator ON
If you see no icons, Press [MENU]
Use the arrow keys to move highlighting over RUN/MAT

Press EXE button.
In Run/MAT screen press [SHIFT][MENU] to access the (SETUP)
By default the mode is et to real as you see on screen capture below

In this mode if you press [SHIFT][X^2] to access the square root, then type in a negative number) you get the following message

To be able to operate on complex number you must set the calculator Compl mode to a+ib. You have to press F2(a+ib)

Press the F2 key corresponding to tab a+ib (complex)
Now if you enter what is on the next screen capture you get the correct result.

There is another way to enter complex numbers: the polar form. It corresponds to the F3 tab r<Theta

With angle set to degrees, you can enter complex numbers in r(r,theta) form (use [SHIFT][X,Theta,T] sequence to enter the wedge). Heis a sample.

I magnified the screen capture before pressing the Post it button, but I dot vouch that the system will respect my wishes. Sorry if pictures are too small for your confort.

May 24, 2010 | Casio FX-9860G Graphic Calculator

### How can i enter a polar form number with angle to convert into a rect form

how can i enter a polar form number with angle to convert into a complex numbe(a+bi)

Apr 28, 2010 | Casio Algebra FX 2.0 Calculator

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