1. Sin & Cos Graphs
Section 4.5

2. Sketch graphs of Sine and Cosine and their Transformations
OBJECTIVE
Sketch graphs of Sine and Cosine and their Transformations

3. RELEVANCE
The universe is full of curves but straight lines are easier to measure. So trigonometry provides the basis for using triangles to measure curved space and objects. Sin and Cos graphs describe oscillations or waves.

4. Spaghetti Activity

5. Let’s explore the sine graph!

6. y = sin Ѳ

7. Let’s explore the cos graph!

9. Let’s graph it on the calculator.
Make sure the calculator is in radian mode
Type sin(x) in y1
Press zoom trig
Now let’s look at y = cos(x).

10. Transformations of Sine & Cosine Graphs

11. Transformation of sine

20. Write the equation of the sine function with the following features.

21. Write the equation of the sine function with the following features.

22. Homework
Worksheet #1