Some Online Help
Here is a short, 5 question, true or false quiz on identities taken from another ThinkQuest.
Some more online trig quizzes can be found here. It's an excellent review broken up into three sections: (1) Definitions of Trigonometric Functions; (2) Values of Functions in the First Quadrant and (3) Trigonometric Identities.
PS Did you find it yet?
Someone will tomorrow ....
new hints on the walls and monitors .... ;-)