Trig Identities Sorting Activity is an interactive and hands on way for students to practice using trig identities to simplify expressions involving trig functions. Students simplify 20 trig expressions to one of the six trig functions (sine, cosine, tangent, cosecant, secant, or cotangent). When completed students will have three or four trig expressions in each of the six trig function columns.This product is also available as part of the PreCalculus Activity Pack (10 interactive PreCalculus