A. \(\left[ { - 1;1} \right]\;\)
B. \(\left[ { - 2;2} \right]\;\)
C. \(R\)
D. \(\left( { - 1;1} \right)\)
A. \(S = \left\{ {\frac{\pi }{2} + k\pi ,k \in Z} \right\}\)
B. \(\left\{ { - \frac{\pi }{2} + k\pi ,k \in Z} \right\}\)
C. \(\left\{ { - \frac{\pi }{2} + k2\pi ,k \in Z} \right\}\)
D. \(\left\{ {\frac{\pi }{2} + k2\pi ,k \in Z} \right\}\)
A. 0
B. 1
C. 2
D. 3
A. \(D = R\backslash \left\{ {k\pi ,k \in Z} \right\}\)
B. \(D = R\backslash \left\{ {\frac{\pi }{2} + k\pi ,k \in Z} \right\}\)
C. \(D = R\backslash \left\{ {\frac{\pi }{2} + k2\pi ,k \in Z} \right\}\)
D. \(D = R\backslash \left\{ {k2\pi ,k \in Z} \right\}\)
A. \(S = \left\{ {\frac{\pi }{2} + k\pi ,k \in Z} \right\}\)
B. \(S = \left\{ {\frac{\pi }{8} + k\pi ,k \in Z} \right\}\)
C. \(S = \left\{ {\frac{\pi }{8} + k\frac{\pi }{4},k \in Z} \right\}\)
D. \(S = \left\{ {\frac{\pi }{8} + k\frac{\pi }{2},k \in Z} \right\}\)
A. \(S = \left\{ {\frac{\pi }{3} + k\pi ,k \in Z} \right\}\)
B. \(S = \left\{ {\frac{\pi }{2} + k\pi ,k \in Z} \right\}\)
C. \(S = \left\{ {\frac{\pi }{2} + k2\pi ,k \in Z} \right\}\)
D. \(S = \left\{ { - \frac{\pi }{6} + k\pi ,k \in Z} \right\}\)
A. \(x = - \frac{\pi }{3}\)
B. \(x = - \frac{\pi }{6}\)
C. \(x = - \frac{{5\pi }}{6}\)
D. \(x = \frac{{ - \pi }}{4}\)
A. \(x= \pm \frac{\pi }{6} + k\pi \)
B. \(x= \pm \frac{\pi }{3} + k\pi \)
C. \(x=\frac{1}{{10}} + \frac{k}{5}\)
D. \(x= \pm \frac{{2\pi }}{9} + \frac{{k\pi }}{3}\)
A. 2
B. 4
C. 3
D. 5
A. 2 lẻ, 2 chẵn
B. 1 lẻ, 3 chẵn
C. 4 lẻ
D. 3 lẻ, 1 chẵn
A. \(\frac{\pi }{{12}} + k\pi \)
B. \(\frac{\pi }{4} + k\pi \)
C. \(\frac{{5\pi }}{8} + k\pi \)
D. \(\frac{\pi }{6} + k\pi \)
A. \(x = \frac{\pi }{4} + k\pi \)
B. \(x = \frac{\pi }{2} + k\pi \)
C. \(x = \frac{\pi }{4} + k\pi ;x = k\pi \)
D. \(x = \frac{\pi }{4} + k\pi ;x = \frac{\pi }{2} + k\pi \)
A. \(x = - \frac{\pi }{4} + k2\pi ;x = \frac{{5\pi }}{4} + k2\pi \)
B. \(x = \frac{\pi }{3} + k2\pi ;x = \frac{{2\pi }}{3} + k2\pi \)
C. \(x = - \frac{\pi }{4} + k2\pi ;x = \frac{{3\pi }}{4} + k2\pi \)
D. \(x = - \frac{\pi }{{12}} + k2\pi ;x = \frac{{5\pi }}{{12}} + k2\pi \)
A. \(x = \frac{\pi }{6} + k\pi \)
B. \(x = - \frac{\pi }{3} + k\pi \)
C. \(x = \frac{{ - \pi }}{6} + k\pi \)
D. \(x = \frac{\pi }{3} + k\pi \)
A. \(D = R\backslash \left\{ {k\frac{{2\pi }}{3},{\rm{ }}k \in Z} \right\}\)
B. \(D = R\backslash \left\{ {\frac{\pi }{2} + k\frac{\pi }{3},{\rm{ }}k \in Z} \right\}\)
C. \(D = R\backslash \left\{ {\frac{\pi }{2} + k\frac{{2\pi }}{3},{\rm{ }}k \in Z} \right\}\)
D. \(D = R\backslash \left\{ {k\frac{\pi }{3},{\rm{ }}k \in Z} \right\}\)
A. \(D = R\backslash \left\{ {\frac{\pi }{{12}} + k\frac{\pi }{2},\frac{\pi }{6} + k\frac{\pi }{2};{\rm{ }}k \in Z} \right\}\)
B. \(D = R\backslash \left\{ {\frac{\pi }{4} + k\frac{\pi }{2},\frac{\pi }{{12}} + k\frac{\pi }{2};{\rm{ }}k \in Z} \right\}\)
C. \(D = R\backslash \left\{ {\frac{\pi }{4} + k\pi ,\frac{\pi }{{12}} + k\frac{\pi }{2};{\rm{ }}k \in Z} \right\}\)
D. \(D = R\backslash \left\{ {\frac{\pi }{6} + k\frac{\pi }{2};\frac{\pi }{4} + k\frac{\pi }{2}{\rm{ }}k \in Z} \right\}\)
A. \(\max y = 6,\min y = - 2\)
B. \(\max y = 4,\min y = - 4\)
C. \(\max y = 6,\min y = - 4\)
D. \(\max y = 6,\min y = - 1\)
A. \(x = \frac{\pi }{2} + \frac{{k\pi }}{4},k \in Z\)
B. \(x = - \frac{\pi }{3} + k\pi ,k \in Z\)
C. \(x = \frac{\pi }{3} + \frac{{k\pi }}{4},k \in Z\)
D. \(x = \frac{{k\pi }}{4},k \in Z\)
A.
\(\left[ \begin{array}{l}
x = - \frac{1}{8} + k\frac{\pi }{2}\\
x = \frac{\pi }{4} + k\frac{\pi }{2}
\end{array} \right.,k \in Z\)
B.
\(\left[ \begin{array}{l}
x = - \frac{1}{8} - \frac{1}{4}\arcsin \frac{1}{3} + k\frac{\pi }{2}\\
x = \frac{\pi }{4} - \frac{1}{8} - \frac{1}{4}\arcsin \frac{1}{3} + k\frac{\pi }{2}
\end{array} \right.,k \in Z\)
C.
\(\left[ \begin{array}{l}
x = \frac{1}{8} - \frac{1}{4}\arcsin \frac{1}{3} + k\frac{\pi }{2}\\
x = \frac{\pi }{4} - \frac{1}{8} - \frac{1}{4}\arcsin \frac{1}{3} + k\frac{\pi }{2}
\end{array} \right.,k \in Z\)
D.
\(\left[ \begin{array}{l}
x = - \frac{1}{8} - \frac{1}{4}\arcsin \frac{1}{3} + k\frac{\pi }{2}\\
x = \frac{\pi }{4} - \frac{1}{4}\arcsin \frac{1}{3} + k\frac{\pi }{2}
\end{array} \right.,k \in Z\)
A.
\(\left[ \begin{array}{l}
x = \frac{\pi }{{50}} + \frac{{k2\pi }}{5}\\
x = \frac{{17\pi }}{{90}} + \frac{{k\pi }}{9}
\end{array} \right.\;\left( {k \in Z} \right)\)
B.
\(\left[ \begin{array}{l}
x = - \frac{{3\pi }}{{50}} + \frac{{k2\pi }}{5}\\
x = \frac{{17\pi }}{{30}} + \frac{{k\pi }}{9}
\end{array} \right.\;\left( {k \in Z} \right)\)
C.
\(\left[ \begin{array}{l}
x = \frac{\pi }{{50}} + \frac{{k2\pi }}{5}\\
x = \frac{\pi }{{30}} + \frac{{k2\pi }}{9}
\end{array} \right.\;\left( {k \in Z} \right)\)
D.
\(\left[ \begin{array}{l}
x = \frac{{3\pi }}{{50}} + \frac{{k2\pi }}{5}\\
x = \frac{{17\pi }}{{90}} + \frac{{k2\pi }}{9}
\end{array} \right.\;\left( {k \in Z} \right)\)
A. Có 1 họ nghiệm
B. Có 2 họ nghiệm
C. Vô nghiệm
D. Có 1 nghiệm duy nhất
A.
\(\left[ \begin{array}{l}
x = k\pi \\
x = \frac{\pi }{3} + k\pi
\end{array} \right.\left( {k \in Z} \right)\)
B.
\(\left[ \begin{array}{l}
x = k\pi \\
x = \frac{{2\pi }}{3} + 2k\pi
\end{array} \right.\left( {k \in Z} \right)\)
C.
\(\left[ \begin{array}{l}
x = 2k\pi \\
x = \frac{{2\pi }}{3} + 2k\pi
\end{array} \right.\left( {k \in Z} \right)\)
D.
\(\left[ \begin{array}{l}
x = k\pi \\
x = \frac{{2\pi }}{3} + k\pi
\end{array} \right.\left( {k \in Z} \right)\)
A. \(x = - \frac{\pi }{4} + k\pi ,k \in Z\)
B. \(x = \pm \frac{\pi }{3} + k\pi ,k \in Z\)
C. \(x = \frac{{3\pi }}{4} + k\pi ,k \in Z\)
D.
\(\left[ \begin{array}{l}
x = \frac{\pi }{4} + k\pi \\
x = \frac{\pi }{3} + k\pi
\end{array} \right.,k \in Z\)
A. \(0 \le m \le \frac{{25}}{8}\)
B. \(0 < m < \frac{{25}}{8}\)
C. \(2 \le m \le \frac{{25}}{8}\)
D. \(2 < m < \frac{{25}}{8}\)
A. \(D = \left[ {0;2\pi } \right]\)
B. \(R\backslash \left\{ { - \frac{\pi }{2} + k2\pi } \right\}\)
C. \(R\backslash \left\{ {\frac{\pi }{2} + k2\pi } \right\}\)
D. \(R\backslash \left\{ { \pm \frac{\pi }{2} + k2\pi } \right\}\)
A. \(y = \sin x\)
B. \(y = {x^2} + \cos 2x\)
C. \(y = \left| {x + \sin x + \tan x} \right|\)
D. \(y = \cos x + \sin x\)
A. \(1\)
B. \(\sqrt 2 \)
C. \(4\)
D. \(2\)
A. \(\forall m \in R\)
B. \( - 2 \le m \le 2\)
C. \( - 1 \le m \le 1\)
D.
\(\left[ \begin{array}{l}
m \le - 1\\
m \ge 1
\end{array} \right.\)
A. \(m \le - 2\)
B. \(m \ge 2\)
C. \( - 2 \le m \le 2\)
D.
\(\left[ \begin{array}{l}
m \le - 2\\
m \ge 2
\end{array} \right.\)
A. \( - \frac{\pi }{6} + k2\pi \)
B. \( - \frac{\pi }{6} + k\pi \)
C. \(\frac{\pi }{6} + k2\pi \)
D. \(\frac{\pi }{6} + k\pi \)
A. \(\frac{\pi }{2} + k\pi \)
B. \(k2\pi \)
C. \(\pi + k2\pi \)
D. \(\frac{\pi }{2} + k2\pi \)
A. \(x = - \frac{\pi }{4} + k2\pi ;x = \frac{{5\pi }}{4} + k2\pi \)
B. \(x = \frac{\pi }{3} + k2\pi ;x = \frac{{2\pi }}{3} + k2\pi \)
C. \(x = - \frac{\pi }{4} + k2\pi ;x = \frac{{3\pi }}{4} + k2\pi \)
D. \(x = - \frac{\pi }{{12}} + k2\pi ;x = \frac{{5\pi }}{{12}} + k2\pi \)
A. \(x = \frac{\pi }{2} + k\pi ;x = \arctan 2 + k\pi \)
B. \(x = \arctan 2 + k\pi \)
C. \(x = \frac{\pi }{2} + k\pi \)
D. \(x = k\pi ;x = \arctan 2 + k\pi )
A. \(x = \frac{\pi }{8} + k\frac{\pi }{2};x = \frac{{7\pi }}{{24}} + k\frac{\pi }{2}\)
B. \(x = k\pi ;x = \pi + k2\pi \)
C. \(x = k2\pi ;x = \frac{\pi }{2} + k2\pi \)
D. \(x = \pi + k2\pi ;x = k\frac{\pi }{2}\)
A. \(x = \frac{{5\pi }}{6}\)
B. \(x = \frac{\pi }{6}\)
C. \(x = \pi \)
D. \(x = \frac{\pi }{{12}}\)
A. 4
B. 6
C. 2
D. 8
A. 4
B. 5
C. 6
D. 2
A.
\(\left[ \begin{array}{l}
\sin x = 0\\
\sin x = 1
\end{array} \right.\)
B.
\(\left[ \begin{array}{l}
\sin x = 0\\
\sin x = - 1
\end{array} \right.\)
C.
\(\left[ \begin{array}{l}
\sin x = 0\\
\sin x = \frac{1}{2}
\end{array} \right.\)
D.
\(\left[ \begin{array}{l}
\sin x = 0\\
\sin x = - \frac{1}{2}
\end{array} \right.\)
A. \(\frac{{{\pi ^2}}}{{16}}\)
B. \( - \frac{{9{\pi ^2}}}{{16}}\)
C. \(\frac{{9{\pi ^2}}}{{16}}\)
D. \( - \frac{{{\pi ^2}}}{{16}}\)
A. 4
B. 8
C. 2
D. 5
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