Perform the indicated calculation. Give your answer in the formz=a+bihttp://www.webassign.net/www32/symIm...f15bb23f3a.gif

not sure how to go about it

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- Apr 14th 2009, 09:58 PMgabet16941express in z=a+bi
Perform the indicated calculation. Give your answer in the form

*z*=*a*+*b**i*http://www.webassign.net/www32/symIm...f15bb23f3a.gif

not sure how to go about it

- Apr 14th 2009, 11:52 PMchisigma
All what you have to use is the [elementary] rule...

$\displaystyle (a^{b})^{c}= a^{b\cdot c}$

... and the [less elementary] Euler's formula...

$\displaystyle e^{i\cdot x}= \cos x + i\cdot \sin x$

Kind regards

$\displaystyle \chi$ $\displaystyle \sigma$