# User talk:169.230.110.161

## November 2009

Welcome to Wikipedia. The recent edit you made to Law of cosines has been reverted, as it appears to have removed content from the page without explanation. Use the sandbox for testing; if you believe the edit was constructive, please ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. HamburgerRadio (talk) 22:44, 3 November 2009 (UTC)

You currently appear to be engaged in an edit war. Note that the three-revert rule prohibits making more than three reversions on a single page within a 24-hour period. Additionally, users who perform several reversions in content disputes may be blocked for edit warring even if they do not technically violate the three-revert rule. When in dispute with another editor you should first try to discuss controversial changes to work towards wording and content that gains a consensus among editors. Should that prove unsuccessful, you are encouraged to seek dispute resolution, and in some cases it may be appropriate to request page protection. Please stop the disruption, otherwise you may be blocked from editing. Martin451 (talk) 23:31, 3 November 2009 (UTC)

If this is a shared IP address, and you didn't make the edit, consider creating an account for yourself so you can avoid further irrelevant notices.

Hello. In case you didn't know, when you add content to talk pages and Wikipedia pages that have open discussion, you should sign your posts by typing four tildes ( ~~~~ ) at the end of your comment. You may also click on the signature button located above the edit window. This will automatically insert a signature with your username or IP address and the time you posted the comment. This information is useful because other editors will be able to tell who said what, and when. Thank you. --SineBot (talk) 23:51, 3 November 2009 (UTC)

## Law of Cosines

HamvergerRadio, please note: The "Laws of Cosines" is plural, NOT singular. There are three formulas based on the article's triangular drawing. They are as follows

${\displaystyle a^{2}=b^{2}+c^{2}-2bc\cos(\alpha )\,}$
${\displaystyle b^{2}=a^{2}+c^{2}-2ac\cos(\beta )\,}$
${\displaystyle c^{2}=a^{2}+b^{2}-2ab\cos(\gamma )\,}$

You can Google the "Laws of Cosines" and verify this easy fact.