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Unit Circle in 45 degrees

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

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Unit Circle in pi/4

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

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Unit Circle in 30 degrees

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

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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

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45 degrees (radians)

pi/4

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90 degrees (radians)

pi/2

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135 degrees (radians)

3pi/4

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225 degrees (radians)

5pi/4

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270 degrees (radians)

3pi/2

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315 degrees (radians)

7pi/4

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360 degrees (radians)

2pi

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Find coterminal angles?

add or subtract 360/2pi

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Quadrant I Reference angle

theta

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Quadrant II Reference angle

180-theta

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Quadrant III Reference angle

theta-180

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Quadrant IV Reference angle

360-theta

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Converting degrees to radian

*pi/180

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Converting radian to degrees

*180/pi

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45 degrees (coordinates)

(root2/2, root2/2)

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90 degrees (coordinates)

(0,1)

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135 degrees (coordinates)

(-root2/2, root2/2)

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180 degrees (coordinates)

(-1,0)

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225 degrees (coordinates)

(-root2/2,-root2/2)

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270 degrees (coordinates)

(0,-1)

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315 degrees (coordinates)

(root2/2,-root2/2)

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0/360 degrees (coordinates)

(1,0)

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30 degrees (coordinates)

(root3/2,1/2)

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60 degrees (coordinates)

(1/2,root3/2)

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120 degrees (coordinates)

(-1/2,root3/2)

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150 degrees (coordinates)

(-root3/2,1/2)

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210 degrees (coordinates)

(-root3/2,-1/2)

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240 degrees (coordinates)

(-1/2,-root3/2)

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300 degrees (coordinates)

(1/2,-root3/2)

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330 degrees (coordinates)

(root3/2,-1/2)

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30 degrees (radians)

pi/6

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60 degrees (radians)

pi/3

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120 degrees (radians)

2pi/3

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150 degrees (radians)

5pi/6

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210 degrees (radians)

7pi/6

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240 degrees (radians)

4pi/3

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300 degrees (radians)

5pi/3

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330 degrees (radians)

11pi/6

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