Author Topic: 2.3 textbook  (Read 341 times)

Yan Zhou

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2.3 textbook
« on: February 09, 2020, 05:52:15 PM »
I am quite confused about the value of $2+sin\theta$. We know $sin\theta = \frac{1}{2i}(z - \frac{1}{z})$,
it says that $2 + sin\theta = 2 +(\frac{1}{2}i)(z-\frac{1}{z})$. Is that a typo?

Victor Ivrii

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Re: 2.3 textbook
« Reply #1 on: February 09, 2020, 06:54:26 PM »
Yes, wrong sign  in the middle (should be $\drac{1}{2i}=-\dfrac{i}{2}$) but the final result is correct