Предмет: Математика, автор: ivanova181098

Система sin(x+y)=0 sin(x-y)=0

Ответы

Автор ответа: Аноним

sin (x + y) = 0 ---> х + у = πn (1)
sin (x - y) = 0 ---> x - y = πn (2)
сложим (1) и (2)
2х = 2πт ---> x = πn
вычтем (2) из (1)
2у = 0
у = 0
Ответ: х = πn n∈Z; y = 0

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