Question

Помогите решить уравнение

Answer 1

√2*cos(x/2 + 3) + 1 = 0
√2*cos(x/2 + 3) =  - 1
cos(x/2 + 3) =  - 1/√2  
cos(x/2 + 3) =  - √2/2
x/2 + 3 = ± 3π/4 + 2πk   k ∈ Z
x/2  = ± 3π/4 - 3 + 2πk   k ∈ Z
x  = ± 3π/2 - 6 + 4πk   k ∈ Z