Question about Texas Instruments TI-86 Calculator

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How do I convert between the rectangular and polar form of a number with imaginary values? i.e. I want to take the number a+bi and convert it to polar D<(angle) and vice versa.

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kakima

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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.

Posted on Dec 11, 2010

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A+bi ~ Rectangular converted to Polar form:

If you use this formula to calculate series capacitive or, parallel inductive current circuitry use actan(-b/a) for the angle measurement. b will always be negative.


How do I convert between - oneplusgh_29.jpg

r angle(Beta) ~Polar converted to Rectangular form:

If you use this formula to calculate series capacitive or, parallel inductive current circuitry use r*sin(Beta)= -(b), b will always be negative.


oneplusgh_30.jpg

Posted on Jan 05, 2011

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1 Answer

Polar rectangular


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

Dec 26, 2013 | Casio FX991ES Scientific Calculator

1 Answer

Polar to rectangular conversion working incorrectly


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


9_6_2012_10_12_22_pm.jpg


9_6_2012_10_13_29_pm.jpg


9_6_2012_10_17_20_pm.jpg


9_6_2012_10_18_09_pm.jpg

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

1 Answer

How to transfom imaginary value to polar


The question is how to represent a complex number in polar form .
Here is how it is done.

8_7_2012_2_15_56_pm.png

Aug 06, 2012 | Casio FX82MS Scientific Calculator

1 Answer

How do i program my calculator to add, subtract, divide and multiply imaginary numbers and get the correct answer?


Press MODE to bring up the mode screen. Use the arrow keys to move down to the line beginning "Real". Highlight either "a+bi" or "re ^ theta i" depending on whether you want to work in rectangular or polar coordinates, then press ENTER to save the change. Press 2ND [QUIT] to exit the mode screen.

Feb 17, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

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

1 Answer

Where is the i button on the TI 86?


There isn't one. If you're entering a complex number in rectangular form, separate the real and imaginary parts with a comma (left of the 4). If you're entering a complex number in polar form, separate the magnitude and the angle with the angle symbol (2nd comma).

Sep 14, 2010 | Texas Instruments TI-86 Calculator

1 Answer

How to change polar form to rectangular form by calculator?


Use the Rec function (shift of the - key).

Rec(r,t) converts a polar value of magnitude r and angle t in the current angular mode. The real value is assigned to X and the imaginary value is assigned to Y.

Use the Pol function (shift of the + key) for the reverse.

It's on page E-37 of the manual. If you've misplaced your manual, you can download a new one from http://www.casio.com/support/manuals

May 28, 2010 | Casio FX-115ES Scientific Calculator

4 Answers

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

2 Answers

How do you use the imaginary number with the TI-84 calculator?


If you want the answer in rectangular form, set MODE a+bi and tap ENTER and QUIT. Tap square root sign, tap (-)4 and close the parenthesis and tap ENTER. The answer is shown as 2i.
If you want the answer in polar form, set MODE to re^xi and and DEGREE. Tap ENTER and QUIT. Tap the square root sign, tap (-)4, close the parenthesis, and tap ENTER. The answer shown is 2e^90i. (2 at ninety degrees). If you selected RADIAN mode, the answer would be 2e^1.57i (2 at 1.57 radians; or 2 at pi/2 radians)

Mar 09, 2009 | Texas Instruments TI-86 Calculator

1 Answer

Hello - i have a casiofx250 calculator and i urgently need to convert from rectanular to polar - how do i do this ? raj


This is an example, plug in your problem.
Convert 12 - 42j to polar form (r ∠ q).
For CASIO calculator...
Keystrokes Display 12 12 rp.gif 12 42 42 plum.gif -42 eq.gif 43.68065934 (= r) xy.gif -74.0546041 (= θ) Therefore,
Complex number in rectangular form: 12 - 42j Same complex number in polar form: 43.7 ∠ -74°

Feb 29, 2008 | Computers & Internet

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