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 Feb 27 accepted How to find surface area of $x=\sqrt{a^2-y^2}$ Feb 27 asked How to find surface area of $x=\sqrt{a^2-y^2}$ Feb 27 comment Surface area formula The last one made me confuse a lot actually. so Now I found a typo of text book then hehe your formula makes more sense for me !! thanks a lot ! Feb 27 accepted Surface area formula Feb 27 comment Surface area formula Hi!! anon I think I can take a scan of textbook and share to this page. but i'm out now so as soon as i got home i will add the link of the text book copy Feb 27 revised Surface area formula i changed the formula parts Feb 27 asked Surface area formula Feb 23 comment How can I determine convergence or divergence? I got it !! Thank you !! Feb 23 accepted How can I determine convergence or divergence? Feb 23 asked How can I determine convergence or divergence? Feb 12 comment How to find $\int_{\frac{\pi}{2}}^{\frac{\pi}{4}}\cot^5x\,\csc^3xdx$ Thank you for sharing idea !! so I can convert $cot^2x = csc^2x-1$ that seems more easier to find the answer :9 Feb 12 accepted How to find $\int_{\frac{\pi}{2}}^{\frac{\pi}{4}}\cot^5x\,\csc^3xdx$ Feb 12 revised How to find $\int_{\frac{\pi}{2}}^{\frac{\pi}{4}}\cot^5x\,\csc^3xdx$ edited body Feb 12 asked How to find $\int_{\frac{\pi}{2}}^{\frac{\pi}{4}}\cot^5x\,\csc^3xdx$ Feb 12 accepted How to evaluate $\int \frac {xe^2}{(1+2x)^2}dx$ Feb 12 asked How to evaluate $\int \frac {xe^2}{(1+2x)^2}dx$ Feb 12 awarded Supporter Feb 12 accepted How can I find the volume of a solid of revolution Feb 12 asked How can I find the volume of a solid of revolution Feb 8 awarded Editor