Note 1 — CHAP. IX.
Reading edition
: The "Suriya Sidhanta," generally assigned to the fifth or sixth century, contains a system of Hindu trigonometry, which not only goes beyond anything known to the Greeks, but involves theorems that were not discovered in Europe till the sixteenth century.—MOUNT-STUART ELPHINSTONE'S India, b. iii. ch. i. p. 129.