Trigonometric function; ratio between the lengths of the adjacent side and the hypotenuse in a right triangle.
1
How does a calculator evaluate the cosine function?
2
A cosine function within a 24-h period was used to characterize daily rhythms using a random regression.
3
In this case, the vertical motion as a function of time would not be a sine or cosine function.
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Seasonality was expressed as a cosine function of a 12-month period, and its significance was evaluated using the Fisher-Yates shuffle method.
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Just using very simple forces, you get a trajectory that looks just like a cosine function - but with no circles.
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Two functions that meet those requirements are the sine and cosine functions.