Trigonometric Ratios (0, 30, 45, 60, 90, 180, 270)
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0, 360, 2π
sin 0 = 0 cos 0 = 1 tan 0 = 0 csc 0 = und sec 0 = 1 cot 0 = und
180 = π
sin 180 = 0 cos 180 = -1 tan 180 = 0 csc 180 = und sec 180 = -1 cot 180 = und
270 = 3π/2
sin 270 = -1 cos 270 = 0 tan 270 = und csc 270 = -1 sec 270 = und cot 270 = 0
30 = π/6
sin 30 = 1/2 cos 30 = (√3)/2 tan 30 = (√3)/3 csc 30 = 2 sec 30 = (2√3)/3 cot 30 = (√3)
45 = π/4
sin 45 = (√2)/2 cos 45 = (√2)/2 tan 45 = 1 csc 45 = (√2) sec 45 = (√2) cot 45 = 1
60 = π/3
sin 60 = (√3)/2 cos 60 = 1/2 tan 60 = (√3) csc 60 = (2√3)/3 sec 60 = 2 cot 60 = (√3)/3
90 = π/2
sin 90 = 1 cos 90 = 0 tan 90 = und csc 90 = 1 sec 90 = und cot 90 = 0