This Color by Code utilizes the Trigonometric Reciprocal Identities, Pythagorean Identities, and Ratio Identities. This is a great "brain break" activity that gives your trigonometry students an opportunity to relax a bit while practicing the trig identities. A key is included with this product.For more trig ratio practice, you might also be interested in:Fast Facts & Fluency - A 1 Minute Math Quiz - Trigonometric RatiosIf you need another no prep lesson plan:Color By Number Trig Ratios - SP