soal limit trigonometri no 4 apa jawabannya

lim { 1 - cos (x +6} / (x^2 + 12x + 36)
lim {1 - cos (x + 6) (1+ cos (x +6) } / (x^2 +12x +36)(1 + cos (x +6)
lim (1 - cos^2 (x +6) }/(x^2+12x +36)(1+cos (x +6)
lim si^2 (x +6) / (x+6)^2(1 + cos(x +6)
lim 1/(1 + cos (x + 6)
= 1/(1+ cos (-6+6)
= 1/(1+cos 0°)
= 1/(1 + 1)
= 1/2