The Unit Circle Radian Measure

90 = /212 0 =2 3 /

=

/ 3

60

45

=

/ 430 = /6

13 5 = 3 / 4150 = 5 /6

180 = 330= 210 7 / 6

0=0=1 1 /6

360 = 2

31

5

=7

5 /4

/ 4

30 0 =5

22 5

=

/3

3 /

24

0

=4

Positive CCW Negative CW

270 = 3/2

-45 = - /4 -120 = -2 /3