Sin x/3*cos пи/5-cos x/3*sin пи/5=квадратный корень - вопрос №5850509353522 от radkov02p08713 16.05.2022 04:04

Question

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

radkov02p08713 · 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...