Re: Complex No question 1

Re: Complex No question 1

Thanks! May I know how you arrived at pi/6 + thetha = 2kpi?

Why 2kpi, to be exact.

Thank you so much!

Re: Complex No question 1

Quote:

Originally Posted by

**Tutu** Thanks! May I know how you arrived at pi/6 + thetha = 2kpi? Why 2kpi, to be exact.

Suppose that where is a positive real number if and only if .

Re: Complex No question 1

Is this a rule, thank you!

Re: Complex No question 1

Re: Complex No question 1

But why is it that when you want a positive real number, it has to be 2kpi?

I think I kind of understand..

Does that meant that the angle has to be in the positive direction to get a positive real number hence 2kpi, not -2kpi or anything?

Re: Complex No question 1

Re: Complex No question 1

How did you get

cos((2k+1)pi) = -1?

More specifically, why 2K+1 and how did you know the whole eqn equals to -1?

Thank you very much once again!