PreCalc Trig Concepts

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13 Terms

1
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sinθ

O/H , 1/cscθ

2
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cosθ

A/H , 1/secθ

3
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tanθ

O/A , 1/cotθ, sinθ/cosθ

4
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cscθ

H/O , 1/sinθ

5
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secθ

H/A , 1/cosθ

6
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cotθ

A/O, 1/tanθ, cosθ/sinθ

7
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0.866(continued)

√3/2

8
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0.707(continued)

√2/2 OR 1/√2

9
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30-60-90 triangle

sides measure 1, √3, 2

<p>sides measure 1, √3, 2 </p>
10
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45-45-90 triangle

sides measure 1, 1, √2

<p>sides measure 1, 1, √2 </p>
11
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sin²θ + cos²θ equation

sin²θ + cos²θ = 1

12
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tan²θ + 1 equation

tan²θ + 1 = sec²θ

13
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1 + cot²θ equation

1 + cot²θ = csc²θ