Trắc nghiệm Toán 11 Bài 2 Phương trình lượng giác...

A. \(x = \frac{\pi }{{20}} + k\frac{\pi }{2};x = \frac{\pi }{5} + k\frac{\pi }{2},k \in \mathbb{Z}.\)    

B. \(x = \frac{\pi }{{20}} + k\frac{\pi }{2};x = \frac{\pi }{{10}} + k\frac{\pi }{2},k \in \mathbb{Z}.\)

C. \(x = \frac{\pi }{{10}} + k\frac{\pi }{2};x = \frac{\pi }{5} + k\frac{\pi }{2},k \in \mathbb{Z}.\)

D. \(x = \frac{{3\pi }}{5} + k\frac{\pi }{2};x = \frac{\pi }{{10}} + k\frac{\pi }{2},k \in \mathbb{Z}.\)

A. \(x =  \pm \arccos \frac{2}{5} - \frac{\pi }{{18}} + k2\pi ,k \in \mathbb{Z}.\)

B. \(x =  \pm \arccos \frac{2}{5} + \frac{\pi }{{18}} + k2\pi ,k \in \mathbb{Z}.\)

C. \(x =  \pm \arccos \frac{5}{2} - \frac{\pi }{{18}} + k2\pi ,k \in \mathbb{Z}.\)

D. \(x =  \pm \arccos \frac{5}{2} + \frac{\pi }{{18}} + k2\pi ,k \in \mathbb{Z}.\)

A. \({x_1} = 5 - \frac{{11\pi }}{6};{x_2} = 5 - \frac{{13\pi }}{6}.\)

B. \({x_1} = 5 + \frac{{11\pi }}{6};{x_2} = 5 - \frac{{13\pi }}{6}.\)

C. \({x_1} = 5 - \frac{{11\pi }}{6};{x_2} = 5 + \frac{{13\pi }}{6}.\)

D. \({x_1} = 5 + \frac{{11\pi }}{6};{x_2} = 5 + \frac{{13\pi }}{6}.\)

A. \(x = \frac{{3\pi }}{5} + k\pi ,k \in \mathbb{Z}.\)

B. \(x = \frac{\pi }{5} + k\pi ,k \in \mathbb{Z}.\)

C. \(x = \frac{{3\pi }}{5} + \frac{{k\pi }}{3},k \in \mathbb{Z}.\)

D. \(x = \frac{\pi }{5} + \frac{{k\pi }}{3},k \in \mathbb{Z}.\)

A. \(x =  - \frac{1}{6} + k\frac{\pi }{2},k \in \mathbb{Z}.\)

B. \(x =  - \frac{1}{3} + k\frac{\pi }{2},k \in \mathbb{Z}.\)

C. \(x =  - \frac{1}{6} + k\pi ,k \in \mathbb{Z}.\)

D. \(x =  - \frac{1}{3} + k\pi ,k \in \mathbb{Z}.\)

A. \(x =  - {200^0} + k{360^0},k \in \mathbb{Z}.\)

B. \(x =  - {200^0} + k{720^0},k \in \mathbb{Z}.\)

C. \(x =  - {20^0} + k{360^0},k \in \mathbb{Z}.\)

D. \(x =  - {20^0} + k{720^0},k \in \mathbb{Z}.\)

A. \(x = \frac{{7\pi }}{{18}} + \frac{{k2\pi }}{3};x = \frac{{7\pi }}{6} + k2\pi ,k \in \mathbb{Z}.\)

B. \(x =  - \frac{{7\pi }}{{18}} + \frac{{k2\pi }}{3};x = \frac{{7\pi }}{6} + k2\pi ,k \in \mathbb{Z}.\)

C. \(x =  - \frac{{7\pi }}{{18}} + \frac{{k2\pi }}{3};x =  - \frac{{7\pi }}{6} + k2\pi ,k \in \mathbb{Z}.\)

D. \(x = \frac{{7\pi }}{{18}} + \frac{{k2\pi }}{3};x =  - \frac{{7\pi }}{6} + k2\pi ,k \in \mathbb{Z}.\)

A. 262

B. 266

C. 281

D. 292