5 7\4 = 6 3\4 5 7\4 = 27\4 6 3\4 ==27\4
4 5\9 = 3 14\9 4 5\9 = 41\9 3 14\9 = 41\9
8 = 7 5\5 7 5\5 = 8
5) (76+5^(1/2))^(1/4)+(4^(1/2)+625^(1/2))^(1/3)=(76+5)^(1/4)+(2+25)^(1/3)=(81)^(1/4)+(27)^(1/3)=3+3=6
6,2+3,1x=-12,4
3,1x=18,6
x=6
Ответ:
Решение:
1 - sin a * cos a * tg a =
= 1 - sin a * cos a * (sin a / cos a) =
= 1 - sin^2 a = cos^2 a