Copy of the reciprocal trig functions on the unit circle
1. explain the etymology of sine, secant and tangent
2. notice the similarity of various triangles
3. deduce relationships between ratios
4. apply Pythagoras' theorem to generate trig. identities to prove.
There are some more ideas and answers at [url]http://mathsurgery.wikispaces.com/C3+chapter+6[/url]
