This self checking worksheet features the six trig functions: sine, cosine, tangent, cosecant, secant and tangent. These are mixed together for some reducing fun!! My students needed more practice at the basics than the book provided before we could safely mix in the co-functions and the 3 Pythagorean's Identities. This is also a good review for the calculus class when I am in need of something for the substitute teacher to give them. Upon finishing this worksheet, the students will reveal the punch line to a riddle.