Задача 30661 ...

vk373959827

2018-10-30 21:07:17

lim_(x → 0) tg^2 2x * ctg^2 5x

sova

2018-10-30 21:09:29

★

ctg5x=1/(tg5x)

lim_(x→0)(tg^22x)/(tg^25x)=lim_(x→0)(tg2x)*(tg2x))/((tg5x)*(tg5x))=
=2*2/(5*5)=4/25