Ответы на вопрос:
Sin(x/3-π/5)=√2/2 x/3-π/5=π/4+2πn u x/3-π/5=3π/4+2πn x/3=π/5+π/4+2πn u x/3=π/5+3π/4+2πn x/3=9π/20+2πn u x/3=19π/20+2πn x=27π/20+6πn u x=57π/20+6πn,n∈z
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