Module 4: Foundations of Trigonometry

 

 

tip

Although these two methods were shown separately, it is common to use a blended approach with some characteristics from each method. Make sure to find a method that works well for you.

Watch Graphing a Cosine Curve Using Transformations and Graphing a Sine Function Using Key Points. These examples show two methods of graphing a sinusoidal function in standard form.

 

 

This is a play button that opens Graphing a Cosine Curve Using Transformations.

 

This is a play button that opens Graphing a Sine Function Using Key Points.



caution

Make sure your function is written in the form Functions written in other forms, such as behave differently.

 

Self-Check 3

 

textbook

  1. Complete “Your Turn” from “Example 3” on page 244 of the textbook. Answer
  2. Complete “Your Turn” from “Example 4” on page 246 of the textbook. Answer
  3. Complete question 17 on page 253 of the textbook. Answer
  4. Complete question C1 on page 255 of the textbook. Answer
Did You Know?

This is a right triangle with the two acute angles labelled A and B.

Angles A and B are complementary because A + B = 90°.


The word sine comes from the Latin word for curve or hollow. The word cosine comes from complementary and sine. The cosine of an angle is the sine of the complement of that angle.


glossary

Add the following terms to your copy of Glossary Terms:


formula sheet

Add the following formulas to your copy of Formula Sheet: