Ответ:
A) 19/27
Б) -3/8
Пошаговое объяснение:
A) tg^2 45° = 1^2 = 1
ctg^4 60° = (√3/3)^4 = 3^2/ 3^4 = 3^(2-4) = 3^(-2) = 1/9
sin^3 90° = 1^3 = 1
cos^2 60° = (1/2)^2 = 1/4
ctg^2 45° = 1^2 = 1
(4 - 2 + 1/9)/ (3 - 1 + 1) = 19/27 ≈ 0.7
Б) (cos п/3)^3 = (1/2)^3 = 1/8
(ctg п/4)^3 = 1^3 = 1
sin 0° = 0
( cos п/2)^2 = 0
sin п/6 = 1/2
cos^2 п/4 = (√2/2)^2 = 2/4 = 1/2
(2*(1/8) - 1 + 0) / (0 + 2*(1/2) + 2*(1/2) = (1/4 - 1) / (1 + 1 ) = -3/8 ≈ 0.375