Решите уравнение 7cos (2x-π/3) = -3.5 - вопрос №274714172335 от костров1 05.02.2022 08:56

Question

Алгебра: Решите уравнение 7cos (2x-π/3) = -3.5

костров1 · Answer

7cos (2x-π/3) = -3.5|:7cos (2x-π/3) = -1/22x-π/3=+-(π-arccos1/2)+2πn, n∈Z2x-π/3=+-2π/3+2πn, n∈Z2x=+-2π/3+π/3+2πn, n∈Z |:2x=+-π/3+π/6+πn, n∈Zx1=π/2+πn, n∈Z          x2=-π/6+πn, n∈Z...