1. October 25, 2011 At the end of today, you will be able to: Use fundamental trigonometric identities.
Warm-up: Match each trig function with its right triangle definition:
Sine θ a) opposite/adjacent
Cosine θ b) hypotenuse/opposite
Tangent θ c) opposite/hypotenuse
Cosecant θ d) adjacent/opposite
Secant θ e) adjacent/hypotenuse
Cotangent θ f) hypotenuse/adjacent
HW: Complete Unit Circle and memorize. Find different strategies to help you remember on YouTube.com. QUIZ Thursday!

2. Correct HW 4.1
18a. 50b. 104a. 8π rad/min or rad/min 18b. 54a. 330° 104b. 200 rad/min or rad/min 48a. 54b. 408° 48b a /7 or radians

3. Filling out the Unit Circle

4. Filling out the Unit Circle

5. Memorize Common Radians!

6. Common Angles to Remember 30°-60°-90° and 45°-45°-90°
Sides of the triangle are in the ratio:

7. Sines, Cosines, and Tangents of Special Angles Convert to radians then find the corresponding trig functions. (Also on Pg. 303)
cos 30° cos 60° sin 30° sin 60° tan 30° tan 60° cos 45° sin 45° tan 45°

8. How this relates to the unit circle…
Each point on the unit circle corresponds to the cosine and sine of the angle.
The x-coordinate is the cosine.
The y-coordinate is the sine.
So each point on the unit circle is (cos , sin)

11. Hand Trick