Trig everything

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23 Terms

1
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Sin (angle)

y

2
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Cos (angle)

x

3
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Tan (angle)

y/x

4
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Sec (angle)

1/cosine (angle) or 1/x

5
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Csc (angle)

1/sin (angle) or 1/y

6
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Cot (angle)

1/tan (angle) or x/y

7
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Sin(-x)

-sin(x)

8
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Tan(-x)

-Tan(x)

9
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Cos(-x)

Cos(x)

10
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Sin2 + Cos2 =

1

11
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1 + Cot2 =

Csc2

12
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1 + Tan2 =

Sec2

13
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Cos(90-x)

Sin(x)

14
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Cot(90-x)

Tan(x)

15
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Csc(90-x)

Sec(x)

16
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Sin(90-x)

Cos(x)

17
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Tan(90-x)

Cot(x)

18
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Sec(90-x)

Csc(x)

19
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Law of sines

sin(A)/a = sin(B)/b = sin(C)/c

20
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Area for law of sines

1/2(first side)(second side)(sin(included angle))

21
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Law of cosines

c2 = a2 + b2 - 2ab(cos(C))

22
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45-45-90

hypotenuse = root2 x leg

23
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30-60-90

longer leg = root3 x short leg, hypotenuse is 2 x short leg