Предмет: Алгебра, автор: Andrey2581

Решить уравнение
б) cos^x+cosx*sinx=0
в)cos(2п-2/3x)+cos(п/2-2/3x)=0
г)2sin^x-5sinxcosx-cos^x=-2

Ответы

Автор ответа: миросічка
0
б)cos^x+cosx*sinx=0 
cos*x(1-sinx)=0
cosx=0
x=пі/2+пі n
sinx=-1
x=пі/2+2пі n
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