Math Tests formulas and practice

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23 Terms

1
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(cos a+b)

cos(a)cos(b)-sin(a)sin(b)

2
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(cos a-b)

cos(a)cos(b)+sin(a)sin(b)

3
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sin(a+b)

sin(a)cos(b)+sin(b)cos(a)

4
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sin(a-b)

sin(a)cos(b)-sin(b)cos(a)

5
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tan(a+b)

tan(a)+tan(b)/1-tan(a)tan(b)

6
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tan(a+b)

sin(a)cos(b)+cos(a)sin(b)/cos(a)cos(b)-sin(a)sin(b)

7
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cos(2x)

cos²(x)-sin²

8
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cos(2x)

2cos²(x)-1

9
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cos(2x)

1-2sin²(x)

10
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sin(2x)

2sin(x)cos(x)

11
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cos(x/2)

± sqrt 1+cos/2

12
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sin(x/2)

± sqrt cos-1/2

13
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tan(x/2)

sin/1+cos

14
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tan(2x)

2tan(x)/1-tan²

15
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csc pi/6

2

16
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csc pi/4

sqrt 2

17
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csc pi/3

2 sqrt3 /3

18
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sec pi/6

2 sqrt3 /3

19
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sec pi/4

sqrt2

20
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sec pi/3

2

21
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cot pi/6

sqrt 3

22
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cot pi/4

1

23
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cot pi/3

sqrt 3 /3