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= ltx->0 x sinx

Let Y = Xsinx

log Y = sinx log x ; // apply log on both the sides

ltx -> 0 logY = ltx->0  sinx logx ; // apply limit on both sides

logY = ltx-> 0 logx/cosecx; // infinity / infinity ; so apply L Hospital rule ; ltx -> 0 logY = log Y why because here log Y is constant doesn't depend upon x.

logY  = ltx->0 (1/x)/-cosecx.cotx ; //

logY = ltx->0(-sinx. tanx)/x ; //

logY = ltx->0 -sinx. (tanx/x) ;

logY = ltx->0 -sinx . 1 ; // ltx->0 tanx/x = 1

log Y = 0

Y = e0 = 1

therefore, Y = 1

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