Trig - sub integrals

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6 Terms

1
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sqrt(a²-x²)

x = a sin theta

2
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sqrt(a²+x²)

x = a tan theta

3
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sqrt(x²-a²)

x = a sec theta

4
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sqrt(a²-x²) identity

1-sin²theta=cos²theta

5
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sqrt(a²+x²) identity

1+tan²theta = sec²theta

6
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sqrt(x²-a²) identity

sec²theta - 1 = tan²theta