Can anyone show me how to determine the Arg(2+i) ?

I know that

But I don't know how to reduce that any further to determine what theta is...

Any help?

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- January 14th 2010, 09:49 AMpaupsers[SOLVED] Help determining principal Arg
Can anyone show me how to determine the Arg(2+i) ?

I know that

But I don't know how to reduce that any further to determine what theta is...

Any help? - January 14th 2010, 10:04 AMPlato
- January 14th 2010, 12:03 PMpaupsers
Sorry, I should've put the whole problem on here. The problem states:

"By writing the individual factors on the left in exponential form, performing the needed operations, and finally changing back to rectangular coordinates, show that

This can be easily shown by just multiplying top and bottom by the conjugate of the denominator, but I have to do it how the directions say. I know how to convert 5i into exponential form, but converting 2+i into exponential form has proven to be more problematic since arctan(1/2) isn't very simple.

Any help? - January 14th 2010, 01:20 PMPlato
- January 14th 2010, 02:34 PMpaupsers
- January 14th 2010, 03:01 PMPlato
- January 14th 2010, 04:14 PMpaupsers
- January 14th 2010, 04:21 PMpaupsers
Nevermind! I figured it out!

Thanks!