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 November 22nd, 2012, 09:41 AM #1 Senior Member   Joined: Apr 2012 Posts: 106 Thanks: 0 Rotate complex number Which number do we get, if we rotate complex number 3 + i around complex number 1-i, whereby angle of rotation is 60°. I cannot imagine what does rotation around the second vector should be..
November 22nd, 2012, 01:05 PM   #2
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Re: Rotate complex number

Quote:
 Originally Posted by Vasily Which number do we get, if we rotate complex number 3 + i around complex number 1-i, whereby angle of rotation is 60°. I cannot imagine what does rotation around the second vector should be..
I'll let you work it out:

(1-i) + {(3+i)-(1-i)}{cos(?/3) + isin(?/3)}

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