![]() Rules of circle geometry, including: angles, arcs, chords, secants, and tangent lines. Trig Cheat Sheet Formulas and Identities Tangent and Cotangent Identities Half Angle Formulas. My parent functions and their inverses for algebra, trig and the conics. My 25 x 25 multiplication table with practice sheet and tips I include Microsoft Word documents so teachers can easily modify them to suit their needs. I do not require my pre-calc students to memorize the various trig identities. I include PDF documents so students can freely access them on their mobile devices. 1 Free Download of Trig Identities Cheat Sheet (PDF) 2 More Resources for Teaching Trig Identities I created this free printable trig identities cheat sheet for my Pre-Calculus students to reference as we work through our unit on trigonometric identities. I am lazy and would rather provide a cheat sheet to my students than to write it all down once more. These are my notes created after giving the same lesson 4-5 times in one week. ![]() Albert Einstein said, "If you can't explain it simply, you don't understand it well enough." I strongly believe that simple is better than complex.
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