Предмет: Алгебра, автор: Айтым

3sinx+5sin2x=0

Ответы

Автор ответа: doloroused

3sinx+10sinx*cosx=0
sinx=0 или 3+10cosx=0 =>cosx=-3/10
x=Pi*n, x=+-arccos(3/10)+2Pi*n

Автор ответа: heydayofsun

$3sinx+5sin2x=0$

$3sinx+5(2sinx*cosx)=0$

$3sinx+10sinx*cosx=0$

$sinx(3+10cosx)=0$

$sinx=0$ $3+10cosx=0$

$x= pi n$ $x=+-arccos(3/10)+2pi n$

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