Question

помогите пожалуйста срочно срочно​

Answer 1

Объяснение:

1)

sin(x+π/4)≤√2/2

3π/4+2πk≤x+π/4≤9π/4+2πk,k∈z

3π/4-π/4+2πk≤x≤9π/4-π/4+2πk,k∈z

2π/4+2πk≤x≤8π/4+2πk,k∈z

π/2+2πk≤x≤2π+2πk,k∈z

x∈[π/2+2πk;2π+2πk],k∈z

2)

2sin3x> -1

sin3x> -1/2

arcsin(-1/2)+2πk<3x<π-arcsin(-1/2)+2πk,k∈z

-π/6+2πk<3x<7π/6+2πk,k∈z

-π/18+2πk/3<x<7π/18+2πk/3,k∈z

x∈(-π/18+2πk/3;7π/18+2πk/3)k∈z