Trigonometric Identities
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Flashcards covering key trigonometric identities and formulas.
Last updated 6:02 AM on 4/1/26
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8 Terms
1
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Sin(a + b)
sin(a) • cos(b) + cos(a) • sin(b)
2
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Sin(a-b)
a) • cos(b) - cos(a) • sin(b)
3
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Cos(a + b)
cos(a) • cos(b) - sin(a) • sin(b)
4
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Cos(a - b)
cos(a) • cos(b) + sin(a) • sin(b)
5
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Sin(2a)
2 • sin(a) • cos(a)
6
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Cos(2a)
cos²(a) - sin²(a)
7
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Cos(2a)
2cos²(a) - 1
8
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Cos(2a)
1-2\sin^2a
