Tentukan nilai [tex] \lim_{x \to \ \pi } \frac{1 + cos x}{ (x - \pi )^{2} }[/tex] !

jawab


limit (x -> π)  (1 + cos x)/ (x - π)²
Hospitall
lim (x->π)  (-  sin x) / 2(x - π) 
hospital
lim ( x -> π) ( - cos x) / 2
= - cos π/ 2
= 1/2