About Jyā - koti-jyā and utkrama-jyā

Jyā, koṭi-jyā and utkrama-jyā are three trigonometric functions introduced by Indian mathematicians and astronomers. The earliest known Indian treatise containing references to these functions is Surya Siddhanta. These are functions of arcs of circles and not functions of angles. Jyā and koti-jyā are closely related to the modern trigonometric functions of sine and cosine. In fact, the origins of the modern terms of "sine" and "cosine" have been traced back to the Sanskrit words jyā and koti-jyā.
Rigveda (padapatha) manuscript in Devanagari, early 19th century

Glossary of Sanskrit words & phrases

6
Aug
2017
Dharma, Hinduism
The following list consists of notable concepts that are derived from Hindu and Buddhist cultures and associated traditions, which are expressed as words in Sanskrit or other Indic languages and Dravidian languages. The main purpose of this list is to make it easy for one to find specific concepts, and to provide a guide to unique concepts of and Buddhism all in one place. Many Sanskrit concepts have an Indian secular meaning as well as .
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