A) X = -Π/4 + KΠ B) X = Π/4 + K2Π C) X = Π/6 + K2Π D) X = Π/4 + KΠ

3/ - DE KIEM TRA 15 PHUT LOP 11 DAP AN
Lớp 11 DE KIEM TRA 15 PHUT LOP 11 DAP AN

3/ Giải pt: sinx + cosx = 0 : a) x = -π/4 + kπ b) x = π/4 + k2π

c) x = π/6 + k2π d) x = π/4 + kπ