May 2, 2008
Consider a circle of radius 1 centered at the origin and an angle of Ø radians. Consider the areas of right triangle OAD, sector OAC, and right triangle OBC. 
Conclude that (cosØ)(sinØ) is less than (sinØ)/(cosØ).

Consider a circle of radius 1 centered at the origin and an angle of Ø radians. Consider the areas of right triangle OAD, sector OAC, and right triangle OBC.

Conclude that (cosØ)(sinØ) is less than (sinØ)/(cosØ).