Integration of hyperbolic function

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paulmdrdo1

i don't know how start. please help.

$\displaystyle\int xsech^2(x^2)dx$

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alyafey22

Gold Member

MHB

Hint :

$$\frac{d}{dx} \tanh(x)=\text{sech}^2(x)$$

What about

$$\frac{d}{dx} \tanh(x^2)$$

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