1. Warm-Up Get out lesson 22 CFU/ Hwk Complete problems 1-11 on the CFU

5. Acc PreCalc Lesson 22 Essential Question: Trig identities … what’s the deal with that? ? Standard: Prove And Apply Trigonometric Identities MCC9 ‐ 12.F.TF.9 (+) Prove The Addition And Subtraction Formulas For sine, cosine, And Tangent And Use Them To solve problems

11. Look at lesson 22 Let’s do problems 5-8 together from the hwk

12. Pythagorean identity Prove Sin 2 θ + cos 2 θ = 1 Well we know on a circle X 2 + y 2 = r 2 now divide both sides by r 2 And simplify using your x – y – r identities

13. Grab a Review before you leave!!!