These Trig Identities and Formulas Foldable Flip Books are the perfect references for your students. They will use them over and over again. Included in the PDF are two different sized foldable Flip Books, one with all the formulas filled in, and the other with blanks for your students to fill in themselves.Included formulas and identitiesRight TriangleQuotient Identities - Reciprocal IdentitiesPythagorean IdentitiesAngle Addition and SubtractionPower ReducingHalf Angle - Double AngleSum to Pro