lim x tends to 0 : 3sinx-sin3x/x³
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lim x tends to 0 : [3sinx-(3sinx - 4sin^{3})]/x^{3}
lim x tends to 0 : [3sinx - 3sinx + 4sin^{3}]/x^{3}
lim x tends to 0 : 4sinx^{3}/x^{3}
lim x tends to 0 :4 [sinx^{3}/x^{3}]
lim x tends to 0 :4 * 1(according to limit formula of sinx)
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lim x tends to 0 : [3sinx - 3sinx + 4sin^{3}]/x^{3}
lim x tends to 0 : 4sinx^{3}/x^{3}
lim x tends to 0 :4 [sinx^{3}/x^{3}]
lim x tends to 0 :4 * 1(according to limit formula of sinx)
4 Happy to Help :)
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