 Welcome Back 

1.  Welcome Back 

2. Lesson Plan EQ: How do we solve for a missing piece of the trig puzzle? Agenda: • Warm Up • Partner Worksheet • Notes on Solving Trig Equations Homework: • Worksheet on Inverse Trig Equations

3. Warm Up What are the 6 trig functions and their ratios? sine, cosine, tangent, cosecant, secant, cotangent sinθ= opp/hyp cosθ = adj/hyp tanθ = opp/adj cscθ = hyp/opp secθ = hyp/adj cotθ = adj/opp

4. Partner Worksheet • Everyone gets the same worksheet • Partner 1 odds, Partner 2 evens • Complete your half and check with key • Ask me/your neighbors if you don’t understand some of them • You’re now the Master of those problems • Complete the other half of the worksheet • Meet with your partner, check each other’s answers and work together to help your partner Master all problems

5. Let’s review the pieces… • Opposite, adjacent and hypotenuse all refer to what? • θ, β, α, A, B, X, and Y all refer to what? • To sum it up:

6. Setting Up Trig Equations What if we do know the measure of one of the acute angles but are missing a side? • Which trig function would we use here? • What would the equation look like? x 45° 4 cm

7. Setting Up Trig Equations • Which trig function would we use here? • What would the equation look like? 12 ft x 30°

8. Solving Trig Equations

9. What if it looks like this…

10. What if we are are trying to solve for the angle? Which Trig function should we use? β 40 m 20 m

11. Practice

12. T.O.D. Finish #’s 1, 9, 17 and have me check them before you leave.

16. hundredth.