Simple complex number question

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January 20th 2010, 06:43 AM
.::MadMaX::.

Simple complex number question

http://img503.imageshack.us/img503/4343/complex3.jpg
January 20th 2010, 07:17 AM
HallsofIvy

Quote:

Originally Posted by .::MadMaX::.

http://img503.imageshack.us/img503/4343/complex3.jpg

Yes, both sine and cosine are periodic with period [ math]2\pi[/tex] so
1) $cos(14\pi)= cos(7(2\pi))= cos(2\pi)= cos(0)= 1$ and
2 $sin(14\pi)= sin(7(2\pi))= sin(\pi)= sin(0)= 0$ .
January 20th 2010, 07:23 AM
.::MadMaX::.

I wasn't so sure about that,because in the book says they are both 0,so I posted question here just to be sure :) Thanks HallsofIvy!

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