I've been studying for an upcoming math test and have come across two problems that I can't figure out how to solve, help is appreciated.

prove:

and question 2:

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- Feb 10th 2010, 01:46 PMCrotonHelp with proving identities
I've been studying for an upcoming math test and have come across two problems that I can't figure out how to solve, help is appreciated.

prove:

and question 2:

- Feb 10th 2010, 01:52 PMe^(i*pi)
- Feb 10th 2010, 01:54 PMicemanfan
For the first problem, write:

For the second problem, write:

- Feb 11th 2010, 02:05 AMCroton
Ah so that how you do it, Thanks!