Sin x/3*cos пи/5-cos x/3*sin пи/5=квадратный корень - вопрос №5849607353522 от shukur3 13.11.2020 16:23

Question

Алгебра: Sin x/3*cos пи/5-cos x/3*sin пи/5=квадратный корень из 2/2

shukur3 · 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...