I found these two questions in a textbook and they are driving me nuts.
How can you derive from that ?
Similarly, how can you with the help of show that
By DeMoivre's formula, their product is .
The fact that the product is 10 i tells you that and or that .
where and, again by DeMoivre's formula, that is equal to . -7+ 24i can be written as where .Similarly, how can you with the help of show that
Wow this problem is confusing. It took me a little bit to figure it out.
HallsofIvy you have a typo when you said
it should be
Thanks for working it out though. It really did help me figure out my mistake.
I kept working out
Since the original problem was in the second quad. Didn't notice the tan had been changed to positive value changing the problem.