# Search results

1. ### Complex number in Denominator

Thanks very much for all the help. I did get this right thanks to all your help!
2. ### Complex number in Denominator

If I convert the denominator as given in the problem I end up with: i r^2 sin(x)+r^2 (-cos(x))+1 I don't see how I can make a conjugate with 3 variables here? Am I missing something? I have went over this several times in attempt to make sure I hadn't made a mistake......
3. ### Complex number in Denominator

1. Homework Statement Express (see attachment) with a real denominator 2. Homework Equations Not sure if there is really relevant equations to use here. 3. The Attempt at a Solution First I multiply the top and bottom by the exponential. That gives me e^ix/(e^ix-r^2). I...

Ok. Thanks!
5. ### Complex numbers (arg)

Yeah but the question is what is What is arg(iz) so doesn't that mean that I mult i times 2-i to give me 1+2i? I think what you just said would be for arg(z). correct?
6. ### Complex numbers (arg)

Ok. Doesn't that mean that it would be tan-1(2) which would be 1.107?
7. ### Complex numbers (arg)

I am thinking now that this should be something like 3pi/8 but I can't explain my logic....
8. ### Complex numbers (arg)

1. Homework Statement I need help on a little review please. z=2-i What is arg(iz) 2. Homework Equations Well iz= 1+2i 3. The Attempt at a Solution I think this should end up being arg(2i/1) But this doesn't seem to make sense because I am wanting to find an angle here...