Trigonometry Identities Flashcards

(43 cards)

1
Q

1/sin θ

A

csc θ

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2
Q

1/cos θ

A

sec θ

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3
Q

1/tan θ

A

cot θ

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4
Q

1/csc θ

A

sin θ

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5
Q

1/sec θ

A

cos θ

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6
Q

1/cot θ

A

tan θ

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7
Q

sin θ/cos θ

A

tan θ

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8
Q

tan θ cos θ

A

sin θ

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9
Q

sin θ/tan θ

A

cos θ

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10
Q

cos θ/sin θ

A

cot θ

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11
Q

cot θ sin θ

A

cos θ

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12
Q

cos θ/cot θ

A

sin θ

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13
Q

sin² θ + cos² θ

A

1

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14
Q

sin² θ

A

1 - cos² θ

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15
Q

cos² θ

A

1 - sin² θ

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16
Q

1 + tan² θ

A

sec² θ

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17
Q

sec² θ - tan² θ

A

1

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18
Q

tan² θ

19
Q

1 + cot² θ

20
Q

cot² θ

21
Q

csc² θ - cot² θ

22
Q

sin(-θ)

23
Q

csc(-θ)

24
Q

cos(-θ)

25
sec(-θ)
sec θ
26
tan(-θ)
-tan θ
27
cot(-θ)
-cot θ
28
sin 2θ
2sin θ cos θ
29
cos 2θ (1/3)
cos² θ - sin² θ
30
cos 2θ (2/3)
2cos² θ - 1
31
cos 2θ (3/3)
1 - 2sin² θ
32
tan 2θ
2tan θ/1 - tan² θ
33
sin (ɑ + β)
sin ɑ cos β + cos ɑ sin β
34
sin (ɑ - β)
sin ɑ cos β - cos ɑ sin β
35
cos (ɑ + β)
cos ɑ cos β - sin ɑ sin β
36
cos (ɑ - β)
cos ɑ cos β + sin ɑ sin β
37
tan (ɑ + β)
tan ɑ + tan β/1 - tan ɑ tan β
38
tan (ɑ - β)
tan ɑ - tan β/1 + tan ɑ tan β
39
sin 3θ (1/2)
-sin³ θ + 3cos² θ sin θ
40
sin 3θ (2/2)
-4sin³ θ + 3sin θ
41
cos 3θ (1/2)
cos³ θ - 3sin² θ cos θ
42
cos 3θ (2/2)
4cos³ θ - 3cos θ
43
tan 3θ (1/2)
3tan θ - tan³ θ/1 - 3tan² θ