2sinx+tgx=0
2sinx+sinx/cosx=0
(2sinx*cosx+sinx)/cosx=0
2sinx*cosx+sinx=0 и cosx≠0
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cosx≠0
x≠π/2+πn, n∈Z
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2sinx*cosx+sinx=0
sinx(2cosx+1)=0
sinx=0 или 2cosx+1=0
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sinx=0
x=πn,n∈Z
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2cosx+1=0
cosx=-1/2
x=-+2π/3+2πn, n∈Z
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Ответ:πn,n∈Z;;-+2π/3+2πn, n∈Z