1. Day 43 Agenda:
Quiz minutes

2. Unit #5: Introduction to Trig
Accel Precalc
Unit #5: Introduction to Trig
Lesson 6: Solving Right Triangles
EQ: How do you use trig to solve real-world problems?
You will need notebook paper to work the example problems on today’s notes.

3. Part I: Solving Right Triangles
Recall:
Define the 6 Trig Functions

4. 180˚
How many degrees are in a right triangle?
How can we use that information to solve for all missing parts of a right triangle?
26.5˚
63.5˚
26.5˚
How can we use the trig ratios and these angles to find the missing sides?
63.5˚
90˚

5. 56
Let’s find side a first.
24.99
50.12 56
Now let’s find side b.

6. Try this one on your own.
30.6˚
59.4˚
30.6˚
3.46
59.4˚
5.85
90˚
6.8

7. How is #3 different from #1 & #2?
What does that tell us about the functions we need to use?
must find angles
must use inverse trig functions

8. Let’s find A first.
193
Now let’s find B.
Find side b.

9. 57.1˚
76.7
49.6
32.9˚
90˚
91.3

10. When in ROME…
43˚40’
86.3
46˚20’
90.4
90˚
125

11. 25˚30’
21.3
64˚30’
44.7
90˚
49.5

12. Assignment #1:
Practice Worksheet #1
#1 – 6 only

13. Day 44 Agenda:
DG minutes

14. Part II:
Solving Word Problems using Right Triangle Trig
Ex 7. Find the distance from point A to point C across the gorge illustrated in the picture.

15. Ex 8. A 13-foot ladder leaning against a building make a 70 angle with the ground. How far up the building does the ladder touch?
13’
70

16. Angle of Depression Angle of Elevation
What is the relationship between the angle of elevation and the angle of depression?
They are congruent. 
RECALL: 2 parallel lines cut by a transversal. 

17. Ex. 9 A ship off-shore from a vertical cliff known to be 100 feet in height takes a sighting of the top of the cliff. If the angle of elevation is found to be 25, how far off-shore is the ship?
100’
25 

18. Assignment:
Finish Practice Worksheet #1
Textbook p #57 – 61 odd
Practice Worksheet #2
End of Unit 5 (test rev on blog)