UNIT CIRCLE (radians)
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tan^-1(-√3)
-π/3
tan^-1(-1)
-π/4
tan^-1(-√3/3)
-π/6
cos(3π/2)
0
cos(π/2)
0
sin(2π)
0
sin(π)
0
cos(2π)
1
sin(π/2)
1
cos(5π/3)
1/2
cos(π/3)
1/2
sin(5π/6)
1/2
sin(π/6)
1/2
cos^-1(-1/2)
2π/3
cos^-1(-√2/2)
3π/4
cos^-1(√3/2)
5π/6
sin^-1(1)
π/2
sin^-1(√3/2)
π/3
cos^-1(√2/2)
π/4
tan^-1(√3/3)
π/6
cos(π)
−1
sin(3π/2)
−1
cos(2π/3)
−1/2
cos(4π/3)
−1/2
sin(11π/6)
−1/2
sin(7π/6)
−1/2
cos(3π/4)
−√2/2
cos(5π/4)
−√2/2
sin(5π/4)
−√2/2
sin(7π/4)
−√2/2
cos(5π/6)
−√3/2
cos(7π/6)
−√3/2
sin(4π/3)
−√3/2
sin(5π/3)
−√3/2
cos(7π/4)
√2/2
cos(π/4)
√2/2
sin(3π/4)
√2/2
sin(π/4)
√2/2
cos(11π/6)
√3/2
cos(π/6)
√3/2
sin(2π/3)
√3/2
sin(π/3)
√3/2
