1. 2.2 Cont. Warm-up (IN) Learning Objective: To understand the origins of the Pythagorean Identities and begin using them in trig expressions. Also, to understand the use and application of co-functions. 1.Tell me how you think you did on your quiz and why you feel that way.

2. NOTES Given Pythagorean Identities divide by a c b Now, divide that by and, divide it by

3. Ex 1 - Find the exact value of each, no calculator!

4. Given sinΘ = and Θ is an acute angle, find the exact value of the remaining 5 trig functions Ex 2 - 1 3 sinΘ = opp hyp 1 3 3 1 3 1 3

5. Check this out! 1 2 1 2 2 3 1 2 2 3 Cofunctions of complimentary angles are equal! Complimentary angles add up to 90º or cofunctions compliments cofunctions compliments cofunctions compliments

6. Ex 3 -

7. HW – p. 138 #28-30, 37-42,45-47,55-57 Out – What are the Pythagorean identities? Summary - Today I feel_________, because…