Siddhānta Śiromaṇi (Sanskrit: सिद्धान्त शिरोमणि for Crown of treatises) [1] is the major treatise of Indian mathematician Bhāskara II. [2] He wrote the Siddhānta Śiromaṇi in when he wasyears old. enoe of them will be preceding sine (i. Length of Perpendicular let fall on the wilbourhall Siddhānta Shiromani. Indian Ancient Astronomy Book by Bhaskaracharya Title: Bibliotheca Indica Created Date/2/AM Appendix. wilbourhall Learn about the life, education and works of Bhaskaracharya, the author of Si