A) X = KΠ (1,5Đ) B) X = - Π/4 + KΠ , X = ARCTAN(-1/3) + KΠ (1,...

3/ a) x = kπ (1,5đ)

b) x = - π/4 + kπ , x = arctan(-1/3) + kπ (1,5đ)

B)

Trắc nghiệm:

1c 2a 3a 4d 5d 6a 7b 8c