This self checking worksheet simplifies Trig expressions using mainly Quotient and Reciprocal Identities as well as Pythagorean Identities. The student will work a problem, then match the solution and the letter at the bottom of the page. The solutions will spell out the answer to a riddle. This worksheet is similar to working odd problems in the book. It is a little more fun because the students get to have the answer to a riddle when they're finished.