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= lim_x⇒0 [sin(4x)+tan(3x)] / [x.cos(4x)]
= lim_x⇒0 [sin(4x)+tan(3x)]/x . lim_x⇒0 1/cos(4x)
= (4+3) . 1/(cos 0)
= 7 . 1/1
= 7 [C]