Video Lecture of the Lecture Note (CC)

Learning Objectives:

After you complete this section, you will be able to

1. describe six trigonometric functions: sine, cosine, tangent, cosecant, secant and cotangent functions

2. evaluate six trigonometric functions of the given angle in a right triangle

3. describe 30-60-90 and 45-45-90 triangles and evaluate six trigonometric functions for $LaTeX: 30^\circ,\:60^\circ$ and $LaTeX: 45^\circ$ .

4. evaluate six trigonometric function values with TI30XA calculator.

5. solve real-life application problems related with trigonometry of right triangles.

Study Tips:

Definitions of six trigonometric functions and the reciprocal relation among them must be remembered clearly.
You are to remember 30-60-90, 45-45-90 triangles with the side lengths and sine, cosine, and tangent function values of $LaTeX: 30^\circ,\:60^\circ$ and $LaTeX: 45^\circ$ . Those will be frequently used throughout the semester. After you watch the video clips, you will be able to follow the explanation on the lecture note easily.

Video Resources and Preliminary Exercise Problems:

4. Practice with evaluating sine, cosine, and tangent functions

5. Practice with more examples (evaluating sine, cosine, and tangent functions)

6. Real-life application

Basic Trigonometry Word Problem (CC)