Trig Identities
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23 Terms
1
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sinx =
1/cscx
2
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cscx =
1/sinx
3
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cosx =
1/sec
4
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secx
1/cosx
5
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tanx =
1/cotx
6
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cotx =
1/tanx
7
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sin(-x)
-sin(x)
8
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cos(-x)
cos(x)
9
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tan(-x)
-tan(x)
10
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csc(-x)
-csc(x)
11
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sec(-x)
sec(x)
12
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cot(-x)
-cot(x)
13
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sin²x+cos²x =
1
14
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1+cot²x =
csc²x
15
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tan²x + 1 =
sec²x
16
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Difference of squares
a² - b² = (a + b)(a - b)
17
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x²-1
= (x + 1)(x - 1)
18
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sin(pi/2 - x)
cos(x)
19
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tan(pi/2 -x)
cot(x)
20
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sec(pi/2-x)
csc(x)
21
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cos(pi/2 - x)
sin(x)
22
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cot(pi/2 - x)
tan(x)
23
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csc(pi/2 - x)
sec(x)