# help complex numbers

Discussion in 'Homework Help' started by facetten, Feb 5, 2008.

1. ### facetten Thread Starter Member

Nov 1, 2007
11
0
hey, i have problem with the math here,

how do i separate the first equation into magnitude and phase angle. the answers are given, but i want to know how to do the math. please do it step by step so i can follow

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2. ### ananya.M Member

Feb 3, 2008
14
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i think you know this basic..let x=a+jb be a complex number... Then its magnitude will be |x|=root of(a^2+b^2) and its angle is -[tan inverse of(b/a)]
you have to find ..|H(jw)|
1)so substitute jw in the place of s..this will give [(R/L)jw]/[-w^2+(R/L)jw+(1/LC)]
2)follow the above formula to get magnitude...
3)while finding angle conjugate H(jw) first and then follow the angle formula.....

3. ### The Electrician AAC Fanatic!

Oct 9, 2007
2,300
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See the attachments for the details.

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4. ### facetten Thread Starter Member

Nov 1, 2007
11
0
thank you, The electrician, i think i understand now , and thanks to ananya.M too