Trig Substitutions

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9 Terms

1
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a² - x²

x = asin∂

2
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a² + x²

x = atan∂

3
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x² - a²

x= asec∂

4
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∫ tanxdx

ln(sec(x)) + C

5
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∫secxdx

ln(sec(x) + tan(x)) + C

6
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sec²x

tan²x + 1

7
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sinxcosx

(1/2)sin(2x)

8
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sin²x

(1/2)(1 - cos(2x))

9
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cot²x

csc²x - 1