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?

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

Introducing the 3 Remaining Trig Functions: Cosecant Secant Cotangent

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

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.

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

45-45-90 triangle x x

Use these relationships to evaluate the following trig functions.

ASSIGNMENT: Textbook p. 310 ODDS #1 – 5, 11- 23, 33 - 37