Mathematics in Ancient and Medieval India c4.s4.t13.3

c4.s4.t13.3

Śaka era i. e., 1658 A.D. He was a follower of *Sūrya-siddhānta* and tried to refute some of the views of Bhāskara II and Munīśvara. Though *Siddhāntatattva-viveka* is mainly a work on astronomy, he made contribution to trigonometry by giving several correct relations between chords and its corresponding arcs in his *jyotpatti* section of Spaṣṭādhyāya. His other works are : *Grahagolatattva*, *Grahasāraṇī*, *Kairāśyudāharaṇa*, a commentary on the Bhāskarācārya's *Līlāvatī*, *Manoramā*, a commentary on the *Grahalāghava* of Gaṇeśa Daivajña, *Sauravasanā*, a commentary on the *Sūryasiddhānta*, and *Śeṣavasanā*, a supplement to the author's *Siddhāntatattvaviveka*¹