APPC review

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16 Terms

1
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Sin(u/2)

Ā±āˆš[(1 - cos(u))/2]

2
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Sin(2u)

2sin(u)cos(u)

3
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Sin(a+b)

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

4
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sin(a-b)

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

5
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Cos(u/2)

Ā±āˆš[(1 + cos(u))/2]

6
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cos(2u)

cosĀ²(u) - sinĀ²(u)

7
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cos(2u)

1-2sinĀ²u

8
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cos(2u)

2cosĀ²u-1

9
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cos(a+b)

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

10
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cos(a-b)

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

11
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tan(u/2)

Ā±āˆš[(1 - cos(u))/(1+cos(u)]

12
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tan(2u)

[(2tan(u))/1-tanĀ²u)]

13
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tan(a+b)

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

14
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tan(a-b)

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

15
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Pythagorean identities

sinĀ²x+cosĀ²x=1

1+tanĀ²x=secĀ²

1+cotĀ²x=cscĀ²

16
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Reciprocal Identities

1/sin=csc

1/cos=sec

1/tan=cot

1/csc=sin

1/sec=cos

1/cot=tan