Bài tập 6 trang 17 SGK Đại số & Giải tích 11

A. \(\dfrac{1}{4}\) và \(1\)   

B. \(\dfrac{3}{5}\) và \(\dfrac{3}{4}\)  

C. \(\dfrac{1}{2}\) và \(\dfrac{{\sqrt 2 }}{2}\) 

D. \(\dfrac{2}{3}\) và \(\dfrac{{\sqrt 3 }}{2}\)  

A. \(2\)  

B. \(2 + \sqrt 2 \)

C. \(\dfrac{3}{2}\)  

D. \(3 - \sqrt 2 \)

A. \( - \dfrac{1}{2}\)  

B. \( - 1\)

C. \(1 - \sqrt 2 \) 

D. \( - \sqrt 2 \)

A. \(\mathbb{R}\backslash \left\{ {\dfrac{\pi }{2} + k\pi } \right\}\)

B. \(\mathbb{R}\backslash \left( { - \dfrac{\pi }{3} + k2\pi ;\dfrac{\pi }{3} + k2\pi } \right)\)

C. \(\mathbb{R}\backslash \left\{ {\left\{ {\dfrac{\pi }{3} + k2\pi } \right\} \cup \left\{ {\dfrac{\pi }{2} + k2\pi } \right\}} \right\}\)

D. \(\mathbb{R}\backslash \left\{ {\left( { - \dfrac{\pi }{3} + k2\pi ;\dfrac{\pi }{3} + k2\pi } \right] \cup \left\{ {\dfrac{\pi }{2} + k\pi } \right\}} \right\}\)

A. \(\mathbb{R}\backslash \left\{ {\dfrac{\pi }{2} + k2\pi } \right\}\)

B. \(\left[ {k2\pi ;\pi  + k2\pi } \right]\)

C. \(\mathbb{R}\backslash \left\{ {\dfrac{\pi }{2} + k\pi } \right\}\)

D. \(\mathbb{R}\backslash \left[ {\dfrac{\pi }{6} + k2\pi ;\dfrac{{5\pi }}{6} + k2\pi } \right]\)

A. \(\mathbb{R}\backslash \left\{ {\dfrac{\pi }{2} + k\pi } \right\}\)

B. \(\mathbb{R}\backslash \left\{ {k\dfrac{\pi }{2}} \right\}\)

C. \(\mathbb{R}\backslash \left\{ {k\pi } \right\}\)

D. \(\mathbb{R}\backslash \left\{ {k2\pi } \right\}\)

A. \(\left[ { - \dfrac{{2\pi }}{3} + k2\pi ;\dfrac{{2\pi }}{3} + k2\pi } \right]\)

B. \(\left[ { - \dfrac{\pi }{3} + k2\pi ;\dfrac{\pi }{3} + k2\pi } \right]\)

C. \(\left[ { - \dfrac{{5\pi }}{6} + k2\pi ;\dfrac{{5\pi }}{6} + k2\pi } \right]\)

D. \(\left[ { - \dfrac{\pi }{4} + k2\pi ;\dfrac{\pi }{4} + k2\pi } \right]\)