Ctg30×sin45×tg150×cos45=

Question

Ctg30×sin45×tg150×cos45=

Answer 1

Решение
Ctg30×sin45×tg150×cos45= √3 * (1/√2)* tg(180 - 30)*(1/√2) =
= (√3/2)*tg30 = (√3/2)*(1/√3) = 1/2