- Bài tập tổng hợp phương trình và hàm số lượng gi...

A $x =  \pm \frac{\pi }{3} + k\pi ,\,\,k \in Z$

B $\left[ {\begin{array}{*{20}{l}}{x = \frac{\pi }{3} + k2\pi }\\{x = \frac{{2\pi }}{3} + m2\pi }\end{array},\,\,} \right.k,\;m \in Z$

C $x =  \pm \frac{\pi }{3} + k2\pi ,\,\,k \in Z$

D $\left[ {\begin{array}{*{20}{l}}{x = \frac{\pi }{3} + k\pi }\\{x = \frac{{2\pi }}{3} + m\pi }\end{array},\,\,} \right.k,\;m \in Z$

A $x = k2\pi$

B $x = k\pi$

C $x = \frac{\pi }{2} + k\pi$

D $x = \frac{\pi }{2} + k2\pi$

A $\tan x = 3$

B $\sin x + 3 = 0$

C $3\sin x - 2 = 0$          

D $2{\cos ^2}x - \cos x - 1 = 0$

A $\frac{\pi }{2}$

B $3\pi$

C $\frac{{3\pi }}{2}$

D $\pi$

A $\left[ \begin{array}{l}x = \frac{\pi }{2} + k\pi \\x = \frac{\pi }{6} + m\pi \end{array} \right.\;\;\left( {k,\;m \in Z} \right)$            

B $\left[ \begin{array}{l}x = \frac{\pi }{2} + k2\pi \\x = \frac{\pi }{6} + m2\pi \end{array} \right.\;\;\left( {k,\;m \in Z} \right)$            

C $\left[ \begin{array}{l}x =  - \frac{\pi }{6} + k2\pi \\x =  - \frac{{5\pi }}{6} + m2\pi \end{array} \right.\left( {k,\;m \in Z} \right)$

D $\left[ \begin{array}{l}x = \frac{\pi }{6} + k2\pi \\x = \frac{{5\pi }}{6} + m2\pi \end{array} \right.\;\left( {k,\;m \in Z} \right)$

A $x = \frac{\pi }{2} + k\pi ,\;\;k \in Z$

B $x = k\pi ,\;k \in Z$

C $x = k2\pi ,\;k \in Z$

D $x = \frac{\pi }{2} + k2\pi ,\;k \in Z$

A $\left[ \begin{array}{l}x = \pi  + k2\pi \;\\x = \frac{\pi }{4} + m\pi \end{array} \right.\;\left( {k,\;m \in Z} \right)$

B $\left[ \begin{array}{l}x = \pi  + k2\pi \\x =  - \frac{\pi }{4} + m2\pi \end{array} \right.\;\;\left( {k,\;\;m \in Z} \right)$            

C $\left[ \begin{array}{l}x = \pi  + k2\pi \\x = \frac{\pi }{4} + m2\pi \end{array} \right.\;\;\left( {k,\;m \in Z} \right)$

D $\left[ \begin{array}{l}x = \pi  + k2\pi \\x =  - \frac{\pi }{4} + m\pi \end{array} \right.\;\;\left( {k,\;m \in Z} \right)$

A $\left[ \begin{array}{l}x =  - \frac{\pi }{6} + k2\pi \\x = \frac{\pi }{2} + m2\pi \end{array} \right.\;\left( {k,\;m \in Z} \right)$

B $\left[ \begin{array}{l}x = \frac{\pi }{6} + k2\pi \\x = \frac{{3\pi }}{2} + m2\pi \end{array} \right.\left( {k,\;m \in Z} \right)$       

C $\left[ \begin{array}{l}x =  - \frac{\pi }{3} + k2\pi \\x = \frac{{5\pi }}{6} + m2\pi \end{array} \right.\left( {k,\;m \in Z} \right)$

D $\left[ \begin{array}{l}x = \frac{\pi }{3} + k2\pi \\x = \frac{\pi }{4} + m2\pi \end{array} \right.\;\left( {k,\;m \in Z} \right)$

A 4

B 1

C 2

D 3

A $x = k2\pi ,\;x = \frac{\pi }{2} + m\pi ,\;x = \frac{\pi }{4} + l\pi$

B $x = k2\pi ,\;x = \frac{\pi }{2} + m2\pi ,\;x = \frac{\pi }{4} + l2\pi$

C $x = k2\pi ,\;x = \frac{\pi }{2} + m2\pi ,\;x = \frac{\pi }{4} + l\pi$                       

D $x = k\pi ,\;x = \frac{\pi }{2} + m\pi ,\;x = \frac{\pi }{4} + l\pi$

A $\left[ \begin{array}{l}x = k3\pi \\x =  \pm \frac{\pi }{4} + m3\pi \\x =  \pm \frac{{5\pi }}{4} + l3\pi \end{array} \right.\;\;\left( {k,\;m,\;l \in Z} \right)$

B $\left[ \begin{array}{l}x = k\pi \\x =  \pm \frac{\pi }{4} + m\pi \\x =  \pm \frac{{5\pi }}{4} + l\pi \end{array} \right.\;\;\left( {k,\;m,\;l \in Z} \right)$                                   

C $\left[ \begin{array}{l}x = k3\pi \\x = \frac{\pi }{4} + m3\pi \\x =  - \frac{\pi }{4} + l3\pi \end{array} \right.\;\;\left( {k,\;m,\;l \in Z} \right)$

D $\left[ \begin{array}{l}x = k3\pi \\x = \frac{{5\pi }}{4} + m3\pi \\x =  - \frac{{5\pi }}{4} + l3\pi \end{array} \right.\;\left( {k,\;m,\;l \in Z} \right)$

A $x = \frac{\pi }{8} + k\frac{\pi }{4}\;\;\left( {k \in Z} \right)$

B $x = \frac{\pi }{4} + k\frac{\pi }{2}\;\;\left( {k \in Z} \right)$                                            

C $x = \frac{\pi }{2} + k\pi \;\;\;\left( {k \in Z} \right)$            

D $x = \pi  + k2\pi \;\;\;\left( {k \in Z} \right)$

A $- 1 < m \le 0$           

B $0 \le m < 1$   

C $0 \le m \le 1.$

D $- 1 < m < 1.$

A $\frac{\pi }{{12}}$

B $\frac{\pi }{6}$         

C $\frac{\pi }{4}$

D $\frac{\pi }{3}$

A $- \frac{{\sqrt 2 }}{2}$

B $\frac{{\sqrt 2 }}{2}$           

C $0$

D $1$

A 4

B 3

C 1

D 2

A $x =  \pm \frac{\pi }{3} + k2\pi \;\;\;\left( {k \in Z} \right)$

B $x =  \pm \frac{\pi }{6} + k2\pi \;\left( {k \in Z} \right)$

C $x =  \pm \frac{\pi }{3} + k\pi \;\left( {k \in Z} \right)$

D $x =  \pm \frac{\pi }{6} + k\pi \;\left( {k \in Z} \right)$

A $m =  - 1;{\rm{ }}M = \frac{1}{2}$

B $m =  - 1;{\rm{ }}M = 2$

C $m =  - \frac{1}{2};{\rm{ }}M = 1$

D $m = 1;{\rm{ }}M = 2$

A 2

B 4

C 3

D 1

A $m =  - 3.$

B $m = \frac{1}{2}$     

C ${m_0} \in \left( {\frac{3}{5};\frac{7}{{10}}} \right].$

D ${m_0} \in \left( { - \frac{3}{5}; - \frac{2}{5}} \right).$