1) 56.483.972.572
2)103.067.025
3)39.008.016.000
3 - 4sin²(3x + π/3) = 0
3 = 4sin²(3x + π/3)
sin²(3x + π/3) = 3/4
sin(3x + π/3) = ±√3/2
1) sin(3x + π/3) = √3/2
3x + π/3 = (-1)ⁿπ/3 + πn, n ∈ Z
x = (-1)ⁿπ/9 - π/9 + πn/3, n ∈ Z
2) sin(3x + π/3) = -√3/2
3x + π/3 = (-1)ⁿ+¹π/3 + πn, n ∈ Z
x = (-1)ⁿ+¹π/9 - π/9 + πn/3, n ∈ Z
Дорисовать нулики. Вот так: 10,2800000000...
X^3 + 6x^2 + 12x +8 = 0; (x + 2)^3 = 0; x + 2 = 0; х = -2;
Используем формулы синуса косинуса двойного угла
(2sin2a*cos2a)/cos 4a)*ctg4a=(sin4a/cos4a)*cos4a/sin 4a=1
тождество верно