ответ: -π/4+πn≤х≤π/4+πn; n∈Z
Объяснение:
-arccos0+2πn≤2х≤arccos0+2πn; n∈Z
-π/2+2πn≤2х≤π/2+2πn; n∈Z
-π/4+πn≤х≤π/4+πn; n∈Z
ответ: -π/4+πn≤х≤π/4+πn; n∈Z
Объяснение:
-arccos0+2πn≤2х≤arccos0+2πn; n∈Z
-π/2+2πn≤2х≤π/2+2πn; n∈Z
-π/4+πn≤х≤π/4+πn; n∈Z