The Joy Of Trigonometry

Trigonometrydeals with the sides and angles of triangles. This lecture definessine,cosine, andtangent, along with their ... (more)

Trigonometrydeals with the sides and angles of triangles. This lecture definessine,cosine, andtangent, along with their reciprocals, thecosecant,secant, andcotangent. Extending these definitions to the unit circle allows a handy measure of angle: theradian. (less)