lim x^2 - 9 / sin (x - 3) x -> 3

Lim x --> 3 = x²-9 / sin (x-3)
Lim x --> 3 = (x+3) (x-3) / sin(x-3)
Lim x --> 3 = (x+3) . 1
Lim x --> 3 = x + 3
= 3 + 3
= 6