1. Section 4.3: Trigonometry Extended – The Circular Functions
Do Now
1. Find all other trig. values of a triangle with the sin  = 1/4

2. Coterminal Angles
Angles in standard position have the initial side coinciding with the positive side of the x-axis.
The other side of the angle is called the terminal side.
Coterminal angles have the angle ending at the same location.
How do you find coterminal angles?

3. Name five coterminal angles, including at least two negative-valued angles.
a) b) c)

4. Finding exact trig values
Assume that Ѳ is an angle in standard position whose terminal side contains the point (-4, 5). Find the exact values of all six trig functions.

5. Developing the Unit Circle

6. Using Reference Triangles to Solve for Trig Functions
Find sin θ and tan θ if cos θ = ¾ and cot θ < 0.

7. Solving for Large Angle Measures
What is the value of ?
What is the value of ?

8. WhiteBoard Activity
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9. More Practice w/ Evaluating Exact Trig Values
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