1. 8.1 Verifying Identities

2. Identities You Already Know
Quotient Identities
Reciprocal Identities

3. Pythagorean Theorem sin cos
Let’s use Pythagorean Thm to find some other identities
Divide by r2
sin
cos
We write it like this:

4. Now, let’s find some more 
Divide by cos2 1
tan2
sec2

5. Now, let’s find one more 
Divide by sin2 1
cot2
csc2

6. Pythagorean Identities
Memorize!!!!
One who wants a tan, seeks the sun
One person on a cot makes a cozy sleepy camper

7. Ex 1) Reduce costan to sin

8. Ex 2) Prove the identity:
Reduce the more complicated side
Don’t touch the other side

9. Ex 2) Prove the identity:
Multiply by recip

10. Ex 3) Verify the identity:
Work on this side
 IDENTITY!!

11. Homework
#801 Pg – 13 odd, 31, 33