3sin^x+cos^x=2sin^x помогите

3sin^x+cos^x=2sin^x  sinx+cosx=0cos(π/2-x)+cosx=0   cos(x)+cos(y) = 2·cos(½(x+y))·cos(½(x-y))2cos(π/4-x/2+x/2)cos(π/4-x)=0cos(π/4-x)=0π/4-x=π/2+πk     x=-π/4-πk   k∈Z