1. Section 5.1A Using Fundamental Identities
Quotient Identities:
Pythagorean Identities:
sin2 u + cos2 u = 1
1 + tan2 u = sec2 u
1 + cot2 u = csc2 u

2. Cofunction Identities:

3. Even/Odd Identities:
sin (-u) = - sin u csc (-u) = - csc u
cos (-u) = cos u sec (-u) = sec u
tan (-u) = - tan u cot (-u) = - cot u
Ex 2: Use the identities to simplify:
sin x cos2 x – sin x

4. Ex 4: Verify the following trigonometric identity:
Ex 5: Factor the following expressions:
a. sec2 θ – 1 b. 4 tan2 θ + tan θ - 3

5. Suggested Assignment:
Section 5.1A
pg 345 – 346
#15 – 26, 39 – 44