Trigonometry

 **What is trigonometry? What was it's purpose? What is it's purpose now?**

 [|Trigonometry's relation to the real world( with a c-map link to the history of sine) made by Karthik]

Some external links: [|"Outline of Trig History]" [|"Beginnings of Trigonometry]" [|"Trig in 17th-18th century Japan]" [|"Dave's Trig page]" [|Interactive Page about Trig]

sines cosines tangents cotangents secant cosecant unit circle contaning the above Worksheet on simpilfying trig expressions and proving trig identities: