1. Unit 9 – Circular Trigonometry Section 9.2 - Trigonometric Values
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2. Redefine the wrapping function values
Instead of
we will now think of the wrapping function as

3. WE KNOW
THEREFORE

5. Now it’s your turn.
To find each trig value:
Find the wrapping function value
Choose the appropriate coordinate

6. We can’t forget the negatives either……here we go:
So when dealing with negative ‘arclengths’
The value of the cosine (cos) remains unchanged
The value of the sine (sin) will change
Now try these three……

7. One More Addition For This Year…

8. Translation from Degrees to Radians

9. First a little arithmetic review:

10. We define
and

11. We define
and