43 terms

The Unit Circle

STUDY
PLAY
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
180 degrees (radians)
pi
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