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Last updated 12:27 PM on 9/22/26
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24 Terms

1
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sin(x) (reciprocal) =

1 / csc(x)

2
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cos(x) (reciprocal) =

1 / sec(x)

3
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tan(x) (reciprocal) =

1 / cot(x)

4
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csc(x) (reciprocal) =

1 / sin(x)

5
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sec(x) (reciprocal) =

1 / cos(x)

6
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cot(x) (reciprocal) =

1 / tan(x)

7
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tan(x) (quotient) =

sin(x) / cos(x)

8
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cot(x) (quotient) =

cos(x) / sin(x)

9
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sin²(x) + cos²(x) =

1

10
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tan²x + 1 =

sec²(x)

11
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1 + cot²(x) =

csc²(x)

12
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sin(-x) =

-sin(x)

13
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cos(-x) =

cos(x)

14
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tan(-x) =

-tan(x)

15
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csc(-x) =

-csc(x)

16
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sec(-x) =

sec(x)

17
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cot(-x) =

-cot(x)

18
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sin(A+B) =

sinA cosB + cosA sinB

19
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cos(A+B) =

cosA cosB - sinA sinB

20
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sin(A-B) =

sinA cosB - cosA sinB

21
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cos(A-B) =

cosA cosB + sinA sinB

22
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sin(2x) =

2 sin(x) cos(x)

23
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cos(2x) =

cos²(x) - sin²(x)

24
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tan(2x) =

sin(2x) / cos(2x)