This self-checking worksheet gives the student a formula to simplify: sin(8B)cos(5B) + cos(8B)sin(5B). The students will simplify the formula to sin(3B). The worksheet gives the solutions as a matching type format:
The student's job is to connect "sin" with "3B." A number will be before the trig function and a letter behind the argument. The student is to match the number with the letter at the bottom of the page to find what happened to the aggressive student.