Bài tập 10 trang 41 SGK Đại số & Giải tích 11

A. \(x \ne \dfrac{\pi }{2} + k2\pi \)

B. \(x \ne k2\pi \)

C. \(x \ne \dfrac{{3\pi }}{2} + k2\pi \)

D. \(x \ne \pi  + k2\pi \)

A. \(y = 7 - 4\tan x\)           

B. \(y = \dfrac{7}{{{{\sin }^2}x}}\)

C. \(y = \dfrac{{\sin x + 1}}{{3 - \cos x}}\)                 

D. \(y = \cot x\)

A. \(m = \dfrac{{15}}{2}\)  

B. \(m = 5\)

C. \(m =  - \dfrac{5}{2}\)    

D. \(m =  - 5\)

A. \(\left[ \begin{array}{l}x = k\pi \\x = \dfrac{\pi }{4} + k\pi \end{array} \right.\)

B. \(\left[ \begin{array}{l}x = k\pi \\x = \dfrac{\pi }{2} + k\pi \end{array} \right.\)

C. \(\left[ \begin{array}{l}x = k\dfrac{\pi }{2}\\x = \dfrac{\pi }{2} + k\pi \end{array} \right.\)

D. \(\left[ \begin{array}{l}x = k\pi \\x = \dfrac{\pi }{4} + k\dfrac{\pi }{2}\end{array} \right.\)

A. \(\left[ \begin{array}{l}x =  - \dfrac{\pi }{{12}} + k\pi \\x = \dfrac{{5\pi }}{{12}} + k\pi \end{array} \right.\)

B. \(\left[ \begin{array}{l}x =  - \dfrac{\pi }{6} + k\pi \\x = \dfrac{\pi }{6} + k\dfrac{\pi }{2}\end{array} \right.\)

C. \(\left[ \begin{array}{l}x =  - \dfrac{\pi }{6} + k\pi \\x = \dfrac{\pi }{3} + k\pi \end{array} \right.\)

D. \(\left[ \begin{array}{l}x =  - \dfrac{\pi }{{12}} + k\pi \\x = \dfrac{{5\pi }}{{24}} + k\dfrac{\pi }{2}\end{array} \right.\)

A. \( - \sqrt 3  \le m \le \sqrt 3 \)

B. \(m \le  - \sqrt 3 ;\,\,m \ge \sqrt 3 \)

C. \( - \sqrt 5  \le m \le \sqrt 5 \)

D. \(m \le  - \sqrt 5 ;\,\,m \ge \sqrt 5 \)