###
Unit Circle in 45 degrees

0, 45, 90, 135, 180, 225, 270, 315, 360

###
Unit Circle in pi/4

0, pi/4, pi/2, 3pi/4, pi, 5pi/4, 3pi/2, 7pi/4, 2pi

###
Unit Circle in 30 degrees

0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360

###
Unit Circle in pi/6

0, pi/6, pi/3, pi/2, 2pi/3, 5pi/6, pi, 7pi/6, 4pi/3, 3pi/2, 5pi/3, 11pi/6, 2pi

###
45 degrees (radians)

pi/4

###
90 degrees (radians)

pi/2

###
135 degrees (radians)

3pi/4

###
225 degrees (radians)

5pi/4

###
270 degrees (radians)

3pi/2

###
315 degrees (radians)

7pi/4

###
360 degrees (radians)

2pi

###
Find coterminal angles?

add or subtract 360/2pi

###
Quadrant I Reference angle

theta

###
Quadrant II Reference angle

180-theta

###
Quadrant III Reference angle

theta-180

###
Quadrant IV Reference angle

360-theta

###
Converting degrees to radian

*pi/180

###
Converting radian to degrees

*180/pi

###
45 degrees (coordinates)

(root2/2, root2/2)

###
90 degrees (coordinates)

(0,1)

###
135 degrees (coordinates)

(-root2/2, root2/2)

###
180 degrees (coordinates)

(-1,0)

###
225 degrees (coordinates)

(-root2/2,-root2/2)

###
270 degrees (coordinates)

(0,-1)

###
315 degrees (coordinates)

(root2/2,-root2/2)

###
0/360 degrees (coordinates)

(1,0)

###
30 degrees (coordinates)

(root3/2,1/2)

###
60 degrees (coordinates)

(1/2,root3/2)

###
120 degrees (coordinates)

(-1/2,root3/2)

###
150 degrees (coordinates)

(-root3/2,1/2)

###
210 degrees (coordinates)

(-root3/2,-1/2)

###
240 degrees (coordinates)

(-1/2,-root3/2)

###
300 degrees (coordinates)

(1/2,-root3/2)

###
330 degrees (coordinates)

(root3/2,-1/2)

###
30 degrees (radians)

pi/6

###
60 degrees (radians)

pi/3

###
120 degrees (radians)

2pi/3

###
150 degrees (radians)

5pi/6

###
210 degrees (radians)

7pi/6

###
240 degrees (radians)

4pi/3

###
300 degrees (radians)

5pi/3

###
330 degrees (radians)

11pi/6

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