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Author Is anyone any good with complex numbers? look inside if you are pleasee
Rob E
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Registered: 1st Jan 06
Location: Madeley, Stafford....I want to live back in Wales!
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2nd Sep 09 at 19:19   View User's Profile U2U Member Reply With Quote
I'm revising for a maths exam tomorrow, I have a past paper im going through and one of the questions is as follows:

Find the real and imaginery parts of:

(1-j2,/3)^2

note: ,/ represents the square root sign.

Can anyone give me some advice on how to go about solving it? I have had a look on numerous websites but they dont explain anything like this
John
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Registered: 30th Jun 03
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2nd Sep 09 at 19:23   View User's Profile U2U Member Reply With Quote
There are loads of sites that explain that, It's first year calculus.

I can't do it though
Tom G
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2nd Sep 09 at 19:23   View User's Profile U2U Member Reply With Quote
(1-j2,/3)^2 = 5
Simplesss
BabyBlade
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Registered: 5th Feb 03
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2nd Sep 09 at 19:23   View User's Profile U2U Member Reply With Quote
i'd imagine find the imaginery parts is quite easy, the real parts however..

good luck!!
All Torque
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Registered: 17th Nov 05
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2nd Sep 09 at 19:23   View User's Profile U2U Member Reply With Quote
j is a letter, not a number.
liamC
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Registered: 28th Feb 04
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2nd Sep 09 at 19:24   View User's Profile U2U Member Reply With Quote
CorsAsh
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Registered: 19th Apr 02
Location: Munich
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2nd Sep 09 at 19:24   View User's Profile U2U Member Reply With Quote
Computer says no.
BabyBlade
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2nd Sep 09 at 19:24   View User's Profile U2U Member Reply With Quote
I don't like it!
Rob E
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Registered: 1st Jan 06
Location: Madeley, Stafford....I want to live back in Wales!
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2nd Sep 09 at 19:25   View User's Profile U2U Member Reply With Quote
I know, that what i'm resitting I can do the easy ones, im just not sure what to do when the whole equasion is within a bracket and raised to a power. You dont want to be doing this kind of shit tbh
John
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2nd Sep 09 at 19:25   View User's Profile U2U Member Reply With Quote
Uni maths is complete balls, I'd just chuck it and save yourself years of hurt.
Rob E
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Location: Madeley, Stafford....I want to live back in Wales!
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2nd Sep 09 at 19:27   View User's Profile U2U Member Reply With Quote
But unfortunately its all part and parcel of the course material.....even though i highly doubt I will be using it after
Rob E
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Location: Madeley, Stafford....I want to live back in Wales!
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2nd Sep 09 at 19:28   View User's Profile U2U Member Reply With Quote
http://www.purplemath.com/modules/complex.htm

that explains compex numbers but not what to do when brackets and powers come into it :/
3lfz
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Registered: 16th Nov 08
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2nd Sep 09 at 19:28   View User's Profile U2U Member Reply With Quote
Haven't done that for a few months now lol, back to school soon to relearn it :sigh:
C2RL R
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Registered: 28th Mar 02
Location: Redcliffe, QLD
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2nd Sep 09 at 19:31   View User's Profile U2U Member Reply With Quote
god i hated doing these on my engineering course. let me check for books on it...
C2RL R
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2nd Sep 09 at 19:41   View User's Profile U2U Member Reply With Quote
i can't find anything that looks like that. i've only got one book here and it only has an introduction to complex numbers at the back.
Rob E
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2nd Sep 09 at 20:36   View User's Profile U2U Member Reply With Quote
sorted

Warren G
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Registered: 14th May 06
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2nd Sep 09 at 20:41   View User's Profile U2U Member Reply With Quote
i done GCSE maths, got an A

might of attempted it back then, now havent got a clue


this is why i didnt do, education that you dont have to do!

RichR
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Registered: 17th Oct 01
Location: Waterhouses, Staffordshire
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3rd Sep 09 at 14:31   View Garage View User's Profile U2U Member Reply With Quote
The worst thing is that you will not use any of this after uni - Part of my course was Engineering Mathematics for 4 years!!! I could have done it 2/3 years ago but not now - haven't used it since!
C2RL R
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3rd Sep 09 at 15:06   View User's Profile U2U Member Reply With Quote
they should really review each person and set their courses accordingly. the reason you find all the bullshit maths on engineering degrees is incase you want to go on to do a phd etc. most people will stop after a degree so the bullshit stuff is pointless.
wilson_sri
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3rd Sep 09 at 15:44   View User's Profile U2U Member Reply With Quote
Bloody hell thats complicated, i still struggle with my times table for fuck sake.
Cosmo
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Registered: 29th Mar 01
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3rd Sep 09 at 15:46   View User's Profile U2U Member Reply With Quote
5dr...the member formerly called Nathy_87 should be able to help you out with these.
Nath
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3rd Sep 09 at 16:02   View User's Profile U2U Member Reply With Quote
Thats not maths.
oceansoul
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Location: Sunbury, Surrey
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3rd Sep 09 at 17:47   View User's Profile U2U Member Reply With Quote
i can do complex numbers when it comes to angles and all that shit, convereting between polar and cartesian (sp) . but hate having to do equations like that. ive just had to resit my maths for my engineerign HNC =[
John
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3rd Sep 09 at 17:48   View User's Profile U2U Member Reply With Quote
When do you use complex numbers in angles?
drunkenfool
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Registered: 7th Feb 03
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3rd Sep 09 at 21:22   View User's Profile U2U Member Reply With Quote
when dealing with polar coordinates. I really don't miss the 1st year 'Theoretical and Numerical Techniques' modules (i.e. maths) of my physics degree

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