limxmendekati 0 1-cos x

limit  trigonometri

lim (x->0) (1 - cos x)
sub x  = 0
lim =  (1 - cos 0) = 1 -1= 0

jika lim (x->0) (1 - cos x) / x
= lim (x-> 0) { 1 - (1 - 2sin¹/₂ x. sin ¹/₂ x) } / (x)
= lim (x->0)  (2 sin 1/2 x . sin 1/2 x )/ x
= 2(1/2)(1/2) (x)(x) / (x)
= 1/2 (x)
x= 0 --> limit = 1/2 (0) = 0