The Unit Circle 0 through 90 degrees (trig of degree/radian=?)
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cos 90°
0
cos π/2
0
sin 0°
0
tan 0°
0
cos 0°
1
sin 90°
1
sin π/2
1
tan 45°
1
tan π/4
1
cos 60°
1/2
cos π/3
1/2
sin 30°
1/2
sin π/6
1/2
tan 90°
undefined
tan π/2
undefined
cos 45°
√2/2
cos π/4
√2/2
sin 45°
√2/2
sin π/4
√2/2
tan 60°
√3
tan π/3
√3
cos 30°
√3/2
cos π/6
√3/2
sin 60°
√3/2
sin π/3
√3/2
tan 30°
√3/3
tan π/6
√3/3