Sinx/3*cos, пи/5-cosx/3*sin пи/5=квадратный корень - вопрос №3535225849087 от Yasha1221 20.06.2020 20:32

Question

Алгебра: Sinx/3*cos, пи/5-cosx/3*sin пи/5=квадратный корень из2/2

Yasha1221 · Answer

Sin(x/3-π/5)=√2/2x/3-π/5=π/4+2πn U x/3-π/5=3π/4+2πnx/3=π/5+π/4+2πn U x/3=π/5+3π/4+2πnx/3=9π/20+2πn U x/3=19π/20+2πnx=27π/20+6πn U x=57π/20+6πn,n∈z...