Lesson #1A
Trig Review

Quote of the Day:
"Obvious is the most dangerous word in mathematics." -- E.T. Bell

Objectives:
The student will review basic right triangle trigonometry.

The student will review basic trigonometric identities.

1. Collect Homework Assignment.

2. Relationship Between Degrees and Radians



3. Trig Functions for Right Triangles

Click here for Mnemonics for the trig ratios

4. Evaluate Trig Functions of Angles in Rectangular Coordinate System

Discuss these terms:
Standard Position Initial Side Terminal Side
Evaluate the trig functions of 120 degrees
Evaluate the trig functions of -pi/2 radians

5. Trig Identities



6. Law of Cosines

c² = a² + b² - 2ab cos(C)

7. Sum and Difference Identities

Click here for the Sum and Difference Identities

Click here for a list of Identities

8. Determine the angle, given the value of a trig function (With and without a calculator)

9. Assignment:

Read pages A8 - A11
Do p. A-12 (15c, 16b, 17, 21, 22, 26, 41, 48) in the Appendix
Continue to work on Mini Exam #1 Review
Come to the Review Session today

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Send any comments or questions to: David Pleacher