Bharatiya Jyotihshastra (History of Indian Astronomy), translated by R. V. Vaidya v2.c12.s2.t89.7

v2.c12.s2.t89.7

This describes the method of finding the value of shadow directly from the arcs without making use of tabular sines. Bhāskarācārya has shown the calculation of chāyā without sines & arcs. Gaṇeśa Daivajñya has succeeded in carrying out all mathematical work in his Grahalāghava without the use of sines & arcs. (see pages 133 to 135). This idea, Sudhākara observes, must have occurred to him from Śrīpati's method. According to Sudhākara, Śrīpati had compiled Ratnāvalī and Ratnasāra, as additional Muhūrta works. The Aufrecht Catalogue mentions Ratnasār. This work may have been an abridged edition of Ratnamālā. The compilation of the other work, Ratnāvalī, does not seem very likely since these two works on Muhūrta were already in existence. Perhaps the work Ratnamālā itself may have been called Ratnāvalī by some people.