Ratios + Trig Triangles + Trig Identities
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SOHCAHTOA + Special Triangles
Last updated 9:25 AM on 6/4/25
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16 Terms
1
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sine
opposite / hypotenuse
2
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cosine
adjacent / hypotenuse
3
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tangent
opposite / adjacent
4
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Equilateral Triangle (30-60-90) - sin30
1/2
5
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Equilateral Triangle (30-60-90) - cos30
√3/2
6
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Equilateral Triangle (30-60-90) - tan30
1/√3
7
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Equilateral Triangle (30-60-90) - sin60
√3/2
8
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Equilateral Triangle (30-60-90) - cos60
1/2
9
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Equilateral Triangle (30-60-90) - tan60
√3
10
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Equilateral Triangle (30-60-90)
11
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Isosceles Triangle (45-45-90)
12
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Isosceles Triangle (45-45-90) - sin45
√2/2 -or- 1/√2
13
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Isosceles Triangle (45-45-90) - cos45
√2/2 or 1/√2
14
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Isosceles Triangle (45-45-90) - tan45
1
15
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Tangent Identity
tanΘ = sinΘ / cosΘ
16
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Pythagorean Identity
sin²Θ + cos²Θ = 1
Note 
Flashcards (39)