Difference between revisions of "Cosine"
Jump to navigation
Jump to search
BRichtigen (talk | contribs) (Cosine Graph) |
(misleading - the graph shows more than a full period) |
||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
'''Cosine''' is a [[trigonometric function]] describing the [[ratio]] of the adjacent side to the [[hypotenuse]] in a [[right triangle]]. It is often abbreviated ''cos''. | '''Cosine''' is a [[trigonometric function]] describing the [[ratio]] of the adjacent side to the [[hypotenuse]] in a [[right triangle]]. It is often abbreviated ''cos''. | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
{| style="background:none" | {| style="background:none" | ||
| | | | ||
| Line 28: | Line 23: | ||
|1 | |1 | ||
|} | |} | ||
| − | |[[Image:Cosine-pi.jpg | + | |[[Image:Cosine-pi.jpg]] |
|} | |} | ||
| − | + | ||
| + | 2π [[radians]] is equivalent to one circle. The graph continues in that pattern. | ||
| + | |||
| + | ==Relation to secant== | ||
| + | |||
| + | <math>\cos \theta = \sin \left(\frac{\pi}{2} - \theta \right) = \frac{1}{\sec \theta}\,</math> | ||
| + | |||
[[Category:Trigonometry]] | [[Category:Trigonometry]] | ||
Latest revision as of 12:19, December 8, 2008
Cosine is a trigonometric function describing the ratio of the adjacent side to the hypotenuse in a right triangle. It is often abbreviated cos.
|
|
2π radians is equivalent to one circle. The graph continues in that pattern.
Relation to secant
<math>\cos \theta = \sin \left(\frac{\pi}{2} - \theta \right) = \frac{1}{\sec \theta}\,</math>