6sin²x+4sinxcosx=1 help pliz

6sin^2x+4sinx×cosx=cos^2x+sin^2x 5sin^2x+4sinx×cosx=cos^2x 5tg^2x+4tgx-1=0 tgx=y 5y^2+4y-1=0 y1=-1 y2=1/5 tgx=-1 x1=arctg (-1)+кП tgx=1/5 x2=arctg1/5+кП