Talk:Muhammad ibn Jābir al-Harrānī al-Battānī

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Contents

[edit] He was a Muslim

Apart from his name, which contains ALLAH and MUHAMMAD, the text of his book "Azzij" is available in Arabic at www.alwaraq.com. The book contains multiple quotes from the Quran and Hadith in addition to the usual Shahadah at the start of chapter 1. These distinctive writing features unequivocally affirm that he was Muslim. --Alwiqi (talk) 03:26, 8 December 2007 (UTC)

Nonsense He was a sabian.--Astriolok 01:49, 14 February 2006 (UTC)

[edit] references in Wikipedia

[edit] Something is wrong

Hello I think, this formula

\sin a = \frac{a}{\sqrt{1 + a^2}}

is wrong.

The good version is this one (4 September 2005)

or this one :

He also solved the equation sin x = a cos x discovering the formula:
\sin x =a \cos x \Leftrightarrow \sin x = \frac{a}{\sqrt{1 + a^2}}

HB

of course, I correct the article Drirpeter (talk) 20:26, 30 December 2007 (UTC)

[edit] Arabic title removed

I recently corrected the title of al-Battani's zij following Kennedy's authoritative study. In doing so I removed the Arabic version of the title formerly given. It would help if anyone knowing Arabic could provide proper Arabic text for the title given. --SteveMcCluskey 19:39, 8 June 2007 (UTC)

I don't think the title in Arabic is necesary, as long as a strict transliteration is used. Those are usualy given in the Dictionary of Scientific Biography of Sezgin's Geschichte des Arabischen Schrifttums. I can look it up this week. —Ruud 10:38, 10 June 2007 (UTC)