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Math Help - Simple complex number question

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    Simple complex number question

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  2. #2
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    Quote Originally Posted by .::MadMaX::. View Post
    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.
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  3. #3
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    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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