Difference between revisions of "Cosine"
From specialfunctionswiki
m (Tom moved page Cosine function to Cosine) |
|
(No difference)
| |
Revision as of 15:52, 4 October 2014
The cosine function, $\cos \colon \mathbb{R} \rightarrow \mathbb{R}$ is the unique solution of the second order initial value problem $$y=-y;y(0)=1,y'(0)=0.$$
