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Calculus and Beyond Homework Help
Both limits of integration change to zero.
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[QUOTE="Ray Vickson, post: 4439531, member: 330118"] Use the fact that the integrand is even, to get [tex]\int_{-\pi}^{\pi} \sqrt{1+x^2} \, dx = 2 \int_0^{\pi} \sqrt{1+x^2} \, dx.[/tex] This type of issue comes up a lot when changing variables in defiinite integrals, so you need to be very aware of it. [/QUOTE]
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Calculus and Beyond Homework Help
Both limits of integration change to zero.
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