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Pre-Calculus

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9 Terms

1
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sin(a+b)

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

2
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sin(a-b)

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

3
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cos(a+b)

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

4
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cos(a-b)

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

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)

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

7
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sin(2a)

2sin(a)cos(b)

8
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cos(2a)

cos²(a)-sin²(b)

9
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tan(2a)

(2tan(a)) / (1-tan²(a))