Unit 9 – Circular Trigonometry Section 9.2 - Trigonometric Values No Calculator

Redefine the wrapping function values Instead of we will now think of the wrapping function as

WE KNOW THEREFORE

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

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……

One More Addition For This Year…

Translation from Degrees to Radians

First a little arithmetic review:

We define and

We define and