# Complex Numbers Calculations

entering complex numbers with

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### #1 arashkhodaei

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Posted 07 January 2014 - 08:24 PM

I have a funny problem with complex numbers calculations. I can not simply enter a complex number with radius and angle, for example: 3<45deg. When I enter the number using angle symbole in OPTN, I receive a "Wrong argument type" error. I can do it easily in simple casio calculators other than classpad and I remember I could do it with my classpad during my MSc course. It would be thankful if someone could help me.

### #2 cp00u

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Posted 08 January 2014 - 09:31 PM

HI

You can simply use the form 3xe^(pi/4)+5xe^(pi/6)+...

good lock

### #3 arashkhodaei

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Posted 09 January 2014 - 09:31 AM

Thanks. I can use different formulas, but in microwave engineering, you need to use several complex parameters in format of 'radius,angle'. I need an straight forward solution, and no extra conversions. You can do it directly in most simple calculators.

### #4 cp00u

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Posted 10 January 2014 - 07:36 AM

I found what you realy want!

You must enter them as vectors in braces like: [3,<(45)]

Don't forget to attention to the angle unit !!

Hoping to be useful

Edited by cp00u, 10 January 2014 - 07:46 AM.

### #5 PsySc0rpi0n

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Posted 09 February 2014 - 03:38 PM

In my CP-FX400 if you want to use a complex number in the polar version you need to enter it the following way:

20|38

in the calculator, the number 20 is the 1st argument and the number 38 is the 2nd argument --> |(20,38). You also need to enable the complex numbers mode.

Edited by PsySc0rpi0n, 09 February 2014 - 03:41 PM.

### #6 PsySc0rpi0n

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Posted 20 March 2014 - 12:04 AM

Hi...

I seem to have a problem with complex numbers. Maybe a configuration issue but I'm obtaining wrong results for the following calculairon:

(15-j10)x14.36|-134.4

The result should be 258.87|-102.7

but the my ClassPad's result is 258.87|259.29

Can't figure out why! Any ideas?

Though, the following calculation:

(10-j20)x12.52|50.6 = 279.96|-12.75

which is correct with the real value!

### #7 PsySc0rpi0n

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Posted 22 March 2014 - 01:00 PM

I got it...

Calculator automatically converts negative angles in their complementary values, meaning -102.7 = 257.3-360

Edited by PsySc0rpi0n, 22 March 2014 - 01:00 PM.

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