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Math 150 > Need To Know Trigonometry > Flashcards

Flashcards in Need To Know Trigonometry Deck (81):
1

sin(30 degrees)

1/2

2

cos(30 degrees)

√ ̅3/2

3

sin(π/6)

1/2

4

cos(π/6)

√ ̅3/2

5

sin(45 degrees)

√ ̅2/2

6

cos(45 degrees)

√ ̅2/2

7

sin(π/4)

√ ̅2/2

8

cos(π/4)

√ ̅2/2

9

sin(60 degrees)

√ ̅3/2

10

cos(60 degrees)

1/2

11

sin(π/3)

√ ̅3/2

12

cos(π/3)

1/2

13

sin(90 degrees)

1

14

cos(90 degrees)

0

15

sin(π/2)

1

16

cos(π/2)

0

17

sin(120 degrees)

√ ̅3/2

18

cos(120 degrees)

-1/2

19

sin(2π/3)

√ ̅3/2

20

cos(2π/3)

-1/2

21

sin(135 degrees)

√ ̅2/2

22

cos(135 degrees)

-√ ̅2/2

23

sin(3π/4)

√ ̅2/2

24

cos(3π/4)

-√ ̅2/2

25

sin(150 degrees)

1/2

26

cos(150 degrees)

-√ ̅3/2

27

sin(5π/6)

1/2

28

cos(5π/6)

-√ ̅3/2

29

sin(180 degrees)

0

30

cos(180 degrees)

-1

31

sin(π)

0

32

cos(π)

-1

33

sin(210 degrees)

-1/2

34

cos(210 degrees)

-√ ̅3/2

35

sin(7π/6)

-1/2

36

cos(7π/6)

-√ ̅3/2

37

sin(225 degrees)

-√ ̅2/2

38

cos(225 degrees)

-√ ̅2/2

39

sin(5π/4)

-√ ̅2/2

40

cos(5π/4)

-√ ̅2/2

41

sin(240 degrees)

-√ ̅3/2

42

cos(240 degrees)

-1/2

43

sin(4π/3)

-√ ̅3/2

44

cos(4π/3)

-1/2

45

sin(270 degrees)

-1

46

cos(270 degrees)

0

47

sin(3π/2)

-1

48

cos(3π/2)

0

49

sin(300 degrees)

-√ ̅3/2

50

cos(300 degrees)

1/2

51

sin(5π/3)

-√ ̅3/2

52

cos(5π/3)

1/2

53

sin(315 degrees)

-√ ̅2/2

54

cos(315 degrees)

√ ̅2/2

55

sin(7π/4)

-√ ̅2/2

56

cos(7π/4)

√ ̅2/2

57

sin(330 degrees)

-1/2

58

cos(330 degrees)

√ ̅3/2

59

sin(11π/6)

-1/2

60

cos(11π/6)

√ ̅3/2

61

sin(0 degrees/360 degrees)

0

62

cos(0 degrees/360 degrees)

1

63

sin(0/2π)

0

64

cos(0/2π)

1

65

sin(A + B)

sinAcosB + sinBcosA

66

sin(A - B)

sinAcosB - sinBcosA

67

cos(A + B)

cosAcosB + sinAsinB

68

cos(A - B)

cosAcosB - sinAsinB

69

sin2A = ?

2sinAcosA

70

cos2A = ? (3 options)

cos^2(A) - sin^2(A)
2cos^2(A) - 1
1 - 2sin^2(A)

71

sinθ

y/r

72

cosθ

x/r

73

tanθ

y/x = sinθ/cosθ

74

cotθ

cosθ/sinθ

75

secθ

1/cosθ

76

cscθ

1/sinθ

77

When graphing trig equations, y = ? (2 options)`

y = Asin(bx)
y = Acos(bx)

78

3 Standard Pythagorean Theorems

sin^2(A) + cos^2(A) = 1
1 + tan^2(A) = sec^2(A)
1 + cot^2(A) = csc^2(A)

79

Inverse trig for sin

y = Arcsinx
y: [-π/2, π/2]

80

Inverse trig for cos

y = Arccosx
y: [0, π]

81

Inverse trig for tan

y = Arctanx
y: (-π/2, π/2)