Integrate x^4 / (1 - x^2)^(3/2)

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SUMMARY

The integral of \( \frac{x^4}{(1-x^2)^{3/2}} \, dx \) can be solved using the substitution \( x = \sin(t) \), which leads to \( dx = \cos(t) \, dt \). This transforms the integral into \( \int \frac{\sin^4(t)}{\cos^2(t)} \, dt \). Further simplification involves rewriting \( \sin^4(t) \) as \( (1 - \cos(2t))^2 \) and expanding it for easier integration.

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1. Integral of (x^4)/(1-x^2)^(3/2) dx

i let x=sint so dx=costdt used the right triangle and simplified to integral of ((sint)^4)/((cost)^2) dt
 
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Now rewrite sin4t as (1-cos2t)2 and expand.
 

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