Hello,

Given the following naming convention:

http://upload.wikimedia.org/wikipedi...y_triangle.svg

It doesn't seam trivial to me to prove that the length of the segment named "tan \theta " is in fact equal to opposite / adjacent, where opposite and adjacent refer to the sides of the triangle inside the circle.

http://upload.wikimedia.org/wikipedi...circledefs.svg

Can any help with this?

Thanks

JL