1. Trigonometric Identities
Honors Precalculus
April 24 – 25, 2018
Mr. Agnew

2. Essential Question Essential Vocabulary
How can you simplify trigonometric expressions using the fundamental identities?
Essential Vocabulary
Pythagorean Identities
Reciprocal Identities
Quotient Identities
Verifying an Identity

3. Reciprocal Identities
Complete these identities…

4. Quotient Identities
Complete these identities (in terms of sine and cosine)…

5. Pythagorean Identities
The three Pythagorean identities…
Let’s verify these identities. Verifying an identity means showing both sides are equal.

6. Simplifying & Verifying
We can simplify trig expressions using the trigonometric identities, common denominators, factoring techniques, “rationalizing,” etc.
Verify means show both sides of the equation are equal.

7. Hints and Practice Hints for verifying… Sample problems…
Start with more complicated side
Common denominators
Conjugates
When in doubt, follow the sines
(and cosines).
Sample problems…

8. Homework: 4/24/18
Handout Pages
#9, 13, 14, 16, 17,
26, 28, 53

9. Homework: 4/25/18
Worksheet Provided