equivalent reps of trig funcs 🤦🏻♀️
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topic 3.12
Last updated 1:36 PM on 3/21/25
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16 Terms
1
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sin²θ + cos²θ =
1
2
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tan²θ + 1 =
sec²θ
3
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1 + cot²θ =
csc²θ
4
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sin²θ =
1 - cos²θ → (1 - cosθ) (1 + cosθ)
5
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tan²θ =
sec²θ - 1
6
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cot²θ =
csc²θ - 1
7
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cos²θ =
1 - sin²θ → (1 - sinθ) (1 + sinθ)
8
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sin(x + y) =
sinxcosy + cosxsiny
9
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sin(x - y) =
sinxcosy - cosxsiny
10
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cos(x + y) =
cosxcosy - sinxsiny
11
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cos(x - y) =
cosxcosy + sinxsiny
12
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sin(2θ) =
2sinθcosθ
13
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cos(2θ) =
cos²θ - sin²θ
1 - 2sin²θ
2cos²θ - 1
14
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three trig identities
sin²θ + cos²θ = 1
tan²θ + 1 = sec²θ
1 + cot²θ = csc²θ
15
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sin²θ + cos²θ = 1
sin²θ = 1 - cos²θ → (1 - cosθ)(1 +cosθ)
cos²θ = 1 - sin²θ → (1 - sinθ)(1 + sinθ)
16
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1 + cot²θ = csc²θ
cot²θ = csc²θ - 1
