Lily E.

asked • 07/12/21

INDEFINITE INTEGRAL

Use the substitution x=2tan(θ) to evaluate the indefinite integral 

∫ (31dx) / ((x^2)sqrt(x^2+4))

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Inactive Tutor answered • 07/12/21

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The following Desmos graph confirms the solution:

desmos.com/calculator/rdfq3jdle0

This is confirmed by noting that f(x) and g(x) have the same graph. where F(x) is an antiderivative of f(x) and g(x) is found by using the Desmos derivative operator.

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