Flashback 9-25-12 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°

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Presentation transcript:

Flashback 9-25-12 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. 

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

A: Summer!

Domain and range of trig functions

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

Now try P. 52 Ex 9,10

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

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

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

homework P. 53 #24, 27- 30, 31,32,35 By Friday, p. 55 Quick Quiz 1-4. Must show work to get any credit.

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