Trigonometric Ratios (0, 30, 45, 60, 90, 180, 270)

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