The Golden Age of Trigonometry was from 190 - 120 BCE by the Greeks. Who is one of the greatest contributors during that time? Clue: He is an astronomer, geographer and a mathematician. He constructed trigonometric tables and used these to reliably predict solar eclipses.

Who used the concept of Trigonometry to observe planetary motion?

Who is an Indian Mathematician/Astronomer/Physicist who discovered Sine and Cosine?

He introduced the abbreviation of the six trigonometric ratios.

Who wrote the first treatise on Trigonometry that was independent of the topic of astronomy?

He is credited in many abbreviation in the fields of trigonometry, algebra and calculus, one of which is "i " used for complex numbers and "e" which is an irrational number equivalent to 2.7182.

He is one of the mathematicians who uses complex number in trigonometry.

He wrote three books in trigonometry the Spherica which contains spherical triangle, spherical geometry and rule of the six quantities.

The word "jya" means _____.