1. Aim: How do we convert radians to degrees and degrees to radians?
Do Now: Find the exact values of a) b) c) d)
HW: p.404 # 4,7 p.405 # 14,16,20 p.409 # 3,4,6,8,9

2. ,
Recall that
then =
Examples:
Convert 30 to radians
Convert 280 to radians

3. The rules for conversion of degree & radian
Degree to radian
Radian to degree
Convert 75 to radian in terms of  36
Convert to degree

5. Convert into degree 1.
18 2.
72 3.
135 4.
330

6. Convert into radian
1. 240
2. 200 
4. 500

7. Find the exact value of 1. 2. 3. 4.

8. Find the exact value of 1. 5. If f(x) = cos3x, find a) a) 0 c) – 12. 3. 4. b) c)
5. If f(x) = cos3x, find a)
a) 0
c) – 1
b) 0