Difference between revisions of "Cosine"
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m (Reverted edits by Ronpaulrules2 (Talk); changed back to last version by Hojimachong) |
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| − | '''Cosine''' is a [[trigonometry|trigonometric]] function. | + | '''Cosine''' is a [[trigonometry|trigonometric]] function describing the ratio of the adjacent side to the hypotenuse in a right triangle. |
<math>\cos \theta = \sin \left(\frac{\pi}{2} - \theta \right) = \frac{1}{\sec \theta}\,</math> | <math>\cos \theta = \sin \left(\frac{\pi}{2} - \theta \right) = \frac{1}{\sec \theta}\,</math> | ||
[[Category:Mathematics]] | [[Category:Mathematics]] | ||
Revision as of 14:21, September 18, 2008
Cosine is a trigonometric function describing the ratio of the adjacent side to the hypotenuse in a right triangle.
<math>\cos \theta = \sin \left(\frac{\pi}{2} - \theta \right) = \frac{1}{\sec \theta}\,</math>