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Help for Integration (2)

\[ \large \int \sqrt[3]{\tan x} \, dx = \, ? \]

Note by Rishabh Deep Singh
1 year, 7 months ago

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I went for 3 substitutions, \( tanx=u^{1/3} \), \(u=tan\theta\),
\( \cos2\theta=t\). Some identities which i used are, \[1+x^6=(1+x^2)(x^4-x^2+1) \] \[1+\cos2\theta=2\cos^{2}\theta \] \[1-\cos2\theta=2\sin^{2}\theta\] \[\sin2\theta=2\sin\theta\cos\theta\] \[tan^{-1}x + tan^{-1}y=tan^{-1}{\dfrac{x+y}{1-xy}} \] I think this will get you through.

Rudraksh Shukla - 1 year, 6 months ago

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