Помогите решить неравенство 3sin^2x+3sinxcosx+2cos^2x-1 <= 0

3sin^2 (x)+3sinxcosx+2cos^2 (x) -sin^ (2) x_cos^ (2) x=0/delim vse na cos^2 (x) poluchaem 3tg^2 (x)+3tgx+2-tg^2 (x) -1 <= 0 oboznachaem tgx=t2t^2+3t+1 <= 0 t1,2=(-3+-1) /4 t1,2=-1,-1/2tgx=-1 x=-pi/4+pik tgx=-1/2 x=acrtg (-1/2)+pik zatem podstavliem eti znachenia na osi x i proveriaem znaki neravensyva