3sin^2x-4sinxcosx+5cos^2x=0

Question

3sin^2x-4sinxcosx+5cos^2x=0

Answer 1

3sin^2x - 4sinxcosx + 5cos^2x = 0    / cos^2x ≠ 0
3tg^2x  - 4tgx + 5 = 0
D = 16 - 4*3*5 < 0 решений нет