Tolong dikaaihani soal limit trigonometri

lim x -> 90˚ (sin x + cos x) /tan x
= lim x -> 90˚ (sin x + cos x)/(sin x/cos x)
=lim x -> 90˚ (sin x. cos x + cos² x)/sin x
= (sin 90˚ . cos 90˚ + cos² 90˚) / sin 90˚
= ( 1 . 0 + 0) / 1
= 0/ 1
= 0