Trigonometry

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12 Terms

1
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Quadrant 1 (pos trig ratio)

A

2
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Quadrant 2 (pos trig ratio)

S

3
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Quadrant 3 (pos trig ratio)

T

4
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Quadrant 3 (pos trig ratio)

C

5
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Quadrant 1 (ref angle)

theta

6
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Quadrant 2 (ref angle)

180 - theta

7
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Quadrant 3 (ref angle)

180 + theta

8
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Quadrant 4 (ref angle)

360 - theta

9
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sin rule (side/angle)

a/sina = b/sinb = c/sinc

10
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cos rule (side)

c2= a2 + b2 - 2ab cosc 

11
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cos rule (angle)

cosc = a2 + b2 - c2 / 2ab

12
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sin rule (area)

A = ½ ab sinc