trigonometric formulas
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Last updated 10:05 AM on 5/14/25
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15 Terms
1
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sin²θ + cos²θ
1
2
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1 + tan²θ
sec²θ
3
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1 + cot²θ
cosec²θ
4
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sin(A + B)
sinA cosB + cosA sinB
5
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sin(A − B)
sinA cosB − cosA sinB
6
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cos(A + B)
cosA cosB − sinA sinB
7
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cos(A − B)
cosA cosB + sinA sinB
8
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tan(A + B)
(tanA + tanB) / (1 − tanA tanB)
9
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tan(A − B)
(tanA − tanB) / (1 + tanA tanB)
10
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sin(2A)
2 sinA cosA
11
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cos(2A)
cos²A − sin²A
12
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cos(2A)
1 − 2sin²A
13
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cos(2A)
2cos²A − 1
14
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tan(2A)
(2 tanA) / (1 − tan²A)
15
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