MathAnalysisCalculusIntegrals

Trigonometric Substitution

Trigonometric choice

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Consider the following integral

$\int \frac{1}{(1-x^2)\sqrt{1+x^2}} \ dx$ Which trigonometric substitution should be performed next?

Select one option from the list

x = \sin(\theta)

x^2 = \tan(\theta)

x + 1 = \csc(\theta)

x = \tan(\theta)

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