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18 Cards in this Set
- Front
- Back
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sin(x+y)
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= sinxcosy + sinycosx
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Half Angle Identity:
sin²x |
= ½ (1-cos2x)
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Half Angle Identity:
cos²x |
= ½ (1+cos2x)
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sinxcosx
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= ½ (sin²x)
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cos(x+y)
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= cosxcosy + sinxsiny
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sec²x
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tan²x + 1
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tan²x
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sec²x -1
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sin (2x)
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= 2sinxcosy
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cos (2x)
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= cos²x - sin²x
= 2cos²x -1 = 1 + 2sin²x |
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cot²x + 1
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= csc²x
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Identities for sinx or cosx trig integrals
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sin²x = ½ (1-cos2x)
cos²x = ½ (1+cos2x) sin²x + cos²x = 1 |
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2cos²x - 1
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= cos(2x)
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Identities for tan or sec trig integrals
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1 + tan²x = sec²x
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sin²x
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= 1-cos²x
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1-2sin²x
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cos(2x)
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cos²x
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= 1 - sin²x
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csc²x - 1
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= cot²x
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1 - 2sin²x
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= cos(2x)
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