Revision history of "2cos(mt)cos(nt)=cos((m+n)t)+cos((m-n)t)"

Jump to: navigation, search

Diff selection: Mark the radio boxes of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.

  • (cur | prev) 22:07, 19 December 2017‎ Tom (talk | contribs)‎ . . (361 bytes) (+361)‎ . . (Created page with "==Theorem== The following formula holds for $m,n \in \{0,1,2,\ldots\}$: $$2\cos(mt)\cos(nt)=\cos((m+n)t)+\cos((m-n)t),$$ where $\cos$ denotes cosine. ==Proof== ==Referen...")
Retrieved from "http://specialfunctionswiki.org/index.php/2cos(mt)cos(nt)%3Dcos((m%2Bn)t)%2Bcos((m-n)t)"