Last edited by fearsking; Sep 9th 2009 at 07:13 AM.
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any one i can be to choose 1 or 2 or 3 or 4
Hi fearsking I think you can start by applying :$\displaystyle e^{\alpha\;i}=\cos\;\alpha + i\;\sin\;\alpha$
i know that but i want second step or solve chooses 1 or 2 or 3 or 4
Hi fearsking If you have applied the formula, then you'll have a form of |x + iy|. Find the modulus, then simplifying it using trigonometry identity
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