1. Graphs of Trig Functions
Unit 5 Day 10
Graphs of Trig Functions

2. Warm-up
Solve the trig equations: 1.) 1 + cos (x) = 0 2.) 2sin(x)cos(x) + cos(x) = 0 3.) Find the area of the triangle if b = 11, a = 8, and Angle C = 37. Round to the nearest hundredth. 4.) Solve the triangle in problem #3. Round to the nearest tenth.
x = 90⁰, -30⁰
x = 180⁰
26.48 units squared
Angle A = 46.2 ⁰
Angle B = 96.8 ⁰ c= 6.7

3. Homework Answers Pg. 19 Pg. 20 x = 30 x = 20 x = 0, 180 x = -90 (270)
x = 90 or 30
x = 45
x = 60
x = 0,90,-45 (315)
x = 90, 120
Pg. 20
x = 20
x = 0, 180
x = 0
x = -7.5 (352.5)
x = 30
x = 30, -30 (330)
x = -60 (300)
x = -120 (240)

4. An Exploration
In Notes
Work as a discovery

5. Graph Sin(x)
Notes p. 30

6. Graph Cos(x)
Notes p. 31

7. Graph Tan(x)
Notes p. 32
What happens to tangent at 90o and 270o? Why is this happening?

8. Graphs of Trig Functions
Students can fill out the table and graph what they get on their own. Then we can review features of the graph after.

9. Remember!!!
a. Angles are measured in
b. We have to check our mode to make sure the calculator knows what measure we are using!!
i. In this class, we will always use , but you should know that radians exist!
 Make sure degree is highlighted
radians and degrees
degrees

10. Graphs of Trig Functions
Notes pg
I think they can fill out the table and graph what they get on their own. Then we can review features of the graph after.

16. Period of a Function *Period is the length of 1 cycle.* OR
The cycle length of the curve.
Y = sin(x) has a period of 360.
y = cos(x) has a period of 360.
y = tan(x) has a period of 180.
We will talk about this more tomorrow!

17. Think of the pi as 180 degrees!!!