∫ x/(sinx)^2dx

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∫x/(sinx)^2dx∫x/(sinx)^2dx∫x/(sinx)^2dx∫x/(sinx)^2dx=∫xcxc^2xdx=-∫xdcotx=-xcotx+∫cotxdx=-xcotx+∫cosx

∫ x/(sinx)^2dx
∫ x/(sinx)^2dx

∫ x/(sinx)^2dx
∫ x/(sinx)^2dx
=∫ xcxc^2xdx
=-∫ xdcotx
=-xcotx+∫cotxdx
=-xcotx+∫cosx/sinxdx
=-xcotx+∫1/sinxdsinx
=-xcotx+ln|sinx|+C

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