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Differentiate the following w.r.t. x:(co...

Differentiate the following w.r.t. x:`(cosx)/(logx), x >0`

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`"Let y" = ("cos"x)/("log"x)`
`rArr (dy)/(dx) = (d)/(dx)(("cos"x))/(("log"x))`
`= ("log"x*(d)/(dx) "cos" x-"cos" x (d)/(dx)"log"x)/(("log" x)^(2))`
`=(-"sin"x"log"x - "cos"x * (1)/(x))/(("log" x)^(2))`
`=-((x"sin"x"log"x + "cos"x))/(x("log" x)^(2))`
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