(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

∫(4x^3)/√(x^2+4)dx

2. Relevant equations

3. The attempt at a solution

So, I let x= 2tanθ

dx= 2sec^2θ dθ

So, √(4tan^2(θ)+4)=2secθ

∫(4x^3)/√(x^2+4)dx=∫((32tan^3(θ))/(2secθ))2sec^2(θ)dθ.

Would it go to ∫16tan^3(θ)2sec(θ)dθ

or ∫32tan^3(θ)sec(θ)dθ

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# Homework Help: Trig substitution ∫(4x^3)/√(x^2+4)

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