Talk:Radian
From Wikipedia, the free encyclopedia
 |
This article is within the scope of WikiProject Mathematics. | ||||
| Mathematics grading: | Start Class | Top Importance | Field: Geometry and topology | ||
Some talk has been archived in Talk:Radian/Dimensional analysis.
Contents |
[edit] Mathematics and Physics?
What about other fields of science? Brianjd 09:57, 2004 Nov 16 (UTC)
- Such as? --P3d0 14:31, Nov 16, 2004 (UTC)
[edit] Dimensional analysis
Some of the symbols in the 'dimensional analysis' section are not displaying properly in my browser. (I'm using Internet Explorer.) What is the problem? Thanks. Axl 18:01, 13 Jan 2005 (UTC)
- Hmm, I'm only having this problem when I use a thin client; the display is fine with a desktop PC. Axl 21:22, 13 Jan 2005 (UTC)
go to preferances>rendering math and mess around with the setting untill something works. One of them WILL work.
- I have moved jobs now and I no longer use a thin client. Thanks anyway. :-) Axl 20:13, 4 Mar 2005 (UTC)
Radians have units [L]/[L]. This matters when doing real dimensional analysis.Doolin 15:51, 2 May 2006 (UTC)
- So add it. I would, but I have no idea what you mean by that, so I probably shouldn't. fel64 14:14, 3 June 2006 (UTC)
[edit] Trigonometric identities
According to the article, the use of radians makes the Limit of (sin x)/x as x approaces 0 equal to 1. However, this identity is true for any angle measurement unit. So why are radians used? --BrainInAVat 17:51, 1 October 2005 (UTC)
Who invented the radian? And when?
[edit] SI Multiples
This seems out of place here. Is there any practicle use for them at all?
-
- I have never seen or heard anyone mention milliradians or microradians, let alone stuff like megaradians. I would indeed propose to remove the table of SI multiples. MHD 12:18, 3 February 2006 (UTC)
-
-
- I believe that milliradians are used in gunnery in some countries, since 1 mrad corresponds conveniently to 1 m at a range of 1000 m. I doubt that prefixes larger than milli- have ever been used. Indefatigable 17:17, 3 February 2006 (UTC)
-
-
-
-
- Not so familiar with gunnery myself, glad someone else is. Can I assume from your message that you acknowledge the uselessness of the complete table of multiples? We could place a reference to milliradians as used in gunnery somewhere in the article, the rest of the table is not needed. I am quite curious if someone could provide an example of the use of kiloradians, megaradians or even gigaradians. That is how many times a complete circle? :-) MHD 20:03, 3 February 2006 (UTC)
-
-
-
-
- A gigaradian is
complete circles. Or was that a rhetorical question? I think it's OK to delete or truncate the table. Several months ago, some folks merged all articles with prefixes into the base unit articles (kilometre merged into metre, gram merged into kilogram, and so on), and it was at this time that prefix tables were added into the articles on all SI base and derived units. For radians it does not make much sense. Indefatigable 21:51, 9 February 2006 (UTC)
- A gigaradian is
-
They are used when considering a bead on a string which is being spun for example, rather than the distance it rotates( circumfrences) being measured the radius( string length) and the number of revolutions is. The number of revolutions is sometimes in radians (4π being 1 revolution) leading to measurements of something which rotates at say 3 million rad/s would be 3 Megarad/s. I dont really see an application of this out side of examination questions. Further, Radians is no longer considered SI is it? seing as it has no units it is now a derived unit as Indefatigable said.Wolfmankurd 18:17, 27 May 2006 (UTC)
[edit] image size reduction
I managed to reduce the image size by a half, by using only 32 colors (I know there are only 5, but for some reason when using only 5 colors the computer chooses the wrong colors) http://xs100.xs.to/xs100/06185/Radian_cropped_color.png deal with this as you'd like.
- pick the palet Wolfmankurd 18:01, 27 May 2006 (UTC)
