Derivatives and trig functions
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15 Terms
1
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cos²(θ) + sin²(θ) =
1
2
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1 + tan²(θ) =
sec²(θ)
3
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cot²(θ) + 1 =
csc²(θ)
4
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2sin(θ)cos(θ) =
sin(2θ)
5
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cos²(θ) - sin2(θ) =
cos(2θ)
6
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-sin²(θ) + cos²(θ) =
-cos(2θ)
7
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2cos²(θ) - 1 =
cos(2θ)
8
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1-2sin²(θ/2) =
cos(2θ)
9
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1-sin²(θ/2) =
cos(θ)
10
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d/dx (sin x) =
cos x
11
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d/dx (tan x) =
sec²x
12
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d/dx (sec x) =
sec x tan x
13
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d/dx (cos x) =
-sin x
14
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d/dx (cot x) =
-csc² x
15
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d/dx (csc x) =
-csc x cot x