Помогите пожалуйста!!!! Срочно
Решите неравенство

N1

cos(x)^2 - sqrt(3)sin(x)cos(x) = 0

cos(x)(cos(x) - sqrt(3)sinx) = 0

cos(x) = 0 cos(x) - sqrt(3)sin(x) = 0

2(cos(x)/2 - sqrt(3)sin(x)/2) = 0

cos(x)/2 - sqrt(3)sin(x)/2 = 0

sin(π/6)cos(x) - cos(π/6)sin(x) = 0

sin(π/6 - x) = 0

x = π/2 + πn π/6 - x = πk

- x = -π/6 + πk

x = π/6 - πk

x = π/6 + πk

Ответ : x = π/2 + πn, x = π/6 + πk

N2

cos(x) =< -0,5

cos(x) = -0,5

x = -2π/3 + 2πn = 4π/3 + 2πn

x = 2π/3 + 2πn

cos(x) =< -0,5

x € [2π/3 + 2πn; 4π/3 + 2πn]

Ответ : [2π/3 + 2πn; 4π/3 + 2πn]