Mathematics in Ancient and Medieval India c8.27

c8.27

and Sin ((π)/7) = .4313... which are correct upto 2 places of decimals. The values of Sin π, Sin (π)/2 and Sin (π)/3 come out to be accurate. Bhāskara I ascribes this formula to Āryabhaṭa I¹. It occurs in the *Brāhma-sphuṭasiddhānta* and in several later works also.²