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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
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
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
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:
Setting Up Trig Equations
What if we do know the measure of one of the acute angles but are missing a side?1. Which trig function would we use here?
2. What would the equation look like?
45°
x
4 cm
Setting Up Trig Equations
1. Which trig function would we use here?
2. What would the equation look like?
30°
x12 ft
Solving Trig Equations
What if it looks like this…
What if we are are trying to solve for the angle?
β20 m
40 mWhich Trig function should we use?
Practice
T.O.D.
Finish #’s 1, 9, 17 and have me check them before you leave.
hundredth.