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Evaluate the following limit: lim(x->0)(...

Evaluate the following limit: `lim_(x->0)(3sin x-4sin^3x)/x`

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`lim_(x->0) (3sin x-4sin^3x)/x`
`= lim_(x->0) {sinx(3 -4sin^2x)}/x`
`= lim_(x->0) (sinx)/x xx lim_(x->0) (3 -4sin^2x)`
`=1 xx 3`
`=3`
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