1. Unit #5: Introduction to Trigonometry
Accel Precalculus
Unit #5: Introduction to Trigonometry
Lesson #4: Define the 6 Trig Functions
EQ: How do you define the 6 trig functions using right triangle trigonometry?

2. Recall:
Given a right triangle, define sine, cosine and tangent for θ.
SOH CAH TOA

3. Introducing the 3 Remaining Trig Functions:
Cosecant Secant Cotangent

4. Define the six trig ratios for the given right triangle.
RECALL:
a2 + b2 = c2

5. Ex. Define all six trig functions for each right triangle
Ex. Define all six trig functions for each right triangle. State exact answers for ratios.

6. 2x Recall: Special Right Triangles
What is the relationship between the sides of these special right triangles?
30-60-90 triangle x 2x

7. 45-45-90 triangle x x

8. Use these relationships to evaluate the following trig functions.

9. ASSIGNMENT:
Textbook p. 310
ODDS #1 – 5, ,