A280189 Version of sexagesimal expansion of sine of one degree given by the Persian mathematician Al-Kashi in the 15th Century.

1, 2, 49, 43, 11, 14, 44, 16, 26, 17

Offset

1,2

Comments

The fifteenth century persian mathematician Jamshid Al-Kashi was the first to calculate the value of sine of one degree correct to ten sexagesimal places (17 decimal digits) in his Risala al-Watar wa'l Jaib.

Links

Table of n, a(n) for n=1..10.

Mohammad K. Azarian,  A Study of Risala al-Watar wa'l Jaib ("The Treatise on the Chord and Sine"), Forum Geometricorum, Volume 15 (2015) 229-242. Mathematical Reviews, MR 3418854 (Reviewed), Zentralblatt MATH, Zbl 1328.01015.

Crossrefs

Cf. A019810, A019812, A049469, A110937, A280188.

Sequence in context: A007861 A296142 A364890 * A280188 A058845 A041287

Adjacent sequences: A280186 A280187 A280188 * A280190 A280191 A280192

Keyword

nonn,base,cons,fini,full

Author

Mohammad K. Azarian, Dec 28 2016

Status

approved