Calc !-Trig Identities
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30 Terms
1
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d/dx[sin x]
cos x
2
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d/dx[cos x]
-sin x
3
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d/dx[tan x]
sec^2 x
4
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d/dx[cot x]
-csc^2 x
5
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d/dx[sec x]
sec x tan x
6
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d/dx[csc x]
-csc x cot x
7
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sin^2 x + cos^2 x
1
8
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1 + tan^2 x
sec^2 x
9
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1 + cot^2 x
csc^2 x
10
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sin(-x)
-sin x
11
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cos(-x)
cos x
12
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tan(-x)
-tan x
13
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cot(-x)
-cot x
14
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sec(-x)
sec x
15
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csc(-x)
-csc x
16
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sin(a + b)
sin a cos b + cos a sin b
17
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sin(a - b)
sin a cos b - cos a sin b
18
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cos(a + b)
cos a cos b - sin a sin b
19
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cos(a - b)
cos a cos b + sin a sin b
20
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tan(a + b)
(tan a + tan b) / (1 - tan a tan b)
21
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tan(a - b)
(tan a - tan b) / (1 + tan a tan b)
22
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sin 2x
2 sin x cos x
23
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cos 2x
cos^2 x - sin^2 x
24
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cos 2x
2 cos^2 x - 1
25
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cos 2x
1 - 2 sin^2 x
26
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tan 2x
2 tan x / (1 - tan^2 x)
27
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sin^2(x/2)
(1 - cos x)/2
28
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cos^2(x/2)
(1 + cos x)/2
29
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tan(x/2)
(1 - cos x)/sin x
30
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tan(x/2)
sin x/(1 + cos x)