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Maths Questions ^_^

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Odette:
what's k in my questions? lolz

/0:
Since sine and cosine have period , if you add to their angle, the results stays the same. You can visualise this by graphing a standard sine graph. Every , the same y-value occurs. So plugging in different k's just gives you a bunch of angles differing by , which, when evaluated, will give you the same result.

Odette:

--- Quote from: DivideBy0 on May 16, 2008, 09:56:12 pm ---Since sine and cosine have period , if you add to their angle, the results stays the same. You can visualise this by graphing a standard sine graph. Every , the same y-value occurs. So plugging in different k's just gives you a bunch of angles differing by , which, when evaluated, will give you the same result.

--- End quote ---

This is what i have to say to that: Huh? >.< -feels stupid-

/0:
Think about the unit circle, the angle measure all the way around is . Since is equal to the y-coordinate at any time and is equal to the x-coordinate at any time, if you add radians onto an angle, all the point will do is move around the circle again and end up at the same point. If you haven't encountered this before it's not easy to explain without a diagram, so there's more info here: http://www.sparknotes.com/testprep/books/sat2/math2c/chapter9section6.rhtml

Odette:
Hmm i still dont know what k is, example perhaps? (sorry)

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