1. Flashback
Which of the following expressions is the closest approximation to the height h, in feet, of the roof truss shown below?
A. 15 tan 20°
B. 15 sin 20°
C. 30 tan 20°
D. 30 sin 20°
E. 

2. What is a math teacher's favorite sum?
Joke of the day
 What is a math teacher's favorite sum?

3. A: Summer!

4. Domain and range of trig functions

5. Finding all trig values with limited info.
Sin Θ = -3/5 and tan Θ < 0
Which quadrant? R=
Cos
Tan
Csc
Sec
cot

6. Now try
P. 52 Ex 9,10

7. Practical application
Enter data on p. 49 into L1 and L2 on yopur calculator.
Calculate sinreg

8. Do trig functions have inverses?
Only if we restrict the domains

9. Using inverses to find angles
Cos -1 (-0.5)
Sin x = 0.7 in 0 < x < 2∏

10. homework
P. 53 #24, , 31,32,35
By Friday, p. 55 Quick Quiz Must show work to get any credit.

11. Exit Slip
True or false: The period of y = sin(x/2) is ∏. Justify your answer.