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intxcosec^2xdx

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SOLUTION :`intxcosec^2xdx` [X=1st
`cosec^2x=2nd`]
=`x.intcosec^2xdx-int[d/DX(x)xxintcosec^2xdx]dx`
=`-xcotx+intcotxdx`
=`-xcotx+ Inabs(SINX)+C`


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