A. D = R
B. D = R \ {0}
C. \({\rm{D}} = R\backslash \left\{ {k\pi ,k \in Z} \right\}.\)
D. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{2} + k\pi ,k \in Z} \right\}.\)
A. D = R
B. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{2} + k\pi ,k \in Z} \right\}.\)
C. \({\rm{D}} = R\backslash \left\{ {k\pi ,k \in Z} \right\}.\)
D. \({\rm{D}} = R\backslash \left\{ {k2\pi ,k \in Z} \right\}.\)
A. \({\rm{D}} = R\backslash \left\{ {k\frac{\pi }{2},\,k \in Z} \right\}.\)
B. \({\rm{D}} = R\backslash \left\{ {k\pi ,\,k \in Z} \right\}.\)
C. \({\rm{D}} = R\backslash \left\{ {\left( {1 + 2k} \right)\frac{\pi }{2},\,k \in Z} \right\}.\)
D. \({\rm{D}} = R\backslash \left\{ {\left( {1 + 2k} \right)\pi ,\,k \in Z} \right\}.\)
A. \(\left( {k2\pi ;\frac{\pi }{2} + k2\pi } \right)\) với \(k\in Z\)
B. \(\left( {\pi + k2\pi ;\frac{{3\pi }}{2} + k2\pi } \right)\) với \(k\in Z\)
C. \(\left( {\frac{\pi }{2} + k2\pi ;\pi + k2\pi } \right)\) với \(k\in Z\)
D. \(\left( {\pi + k2\pi ;2\pi + k2\pi } \right)\) với \(k\in Z\)
A. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{4} + k\pi ,k \in Z} \right\}.\)
B. \({\rm{D}} = \emptyset .\)
C. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{8} + k\frac{\pi }{2},k \in Z} \right\}.\)
D. D = R
A. \({\rm{D}} = R\backslash \left\{ {\frac{{3\pi }}{2} + k2\pi ,k \in Z} \right\}.\)
B. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{2} + k2\pi ,k \in Z} \right\}.\)
C. \({\rm{D}} = R\backslash \left\{ {\frac{{3\pi }}{2} + k\pi ,k \in Z} \right\}.\)
D. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{2} + k\pi ,k \in Z} \right\}.\)
A. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{2} + k2\pi ,k \in Z} \right\}.\)
B. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{2} + k\pi ,k \in Z} \right\}.\)
C. \({\rm{D}} = R\backslash \left\{ {\pi + k\pi ,k \in Z} \right\}.\)
D. D = R
A. D = R
B. \({\rm{D}} = \left[ { - 2; + \infty } \right).\)
C. \({\rm{D}} = \left[ {0;2\pi } \right].\)
D. \({\rm{D}} = \emptyset .\)
A. \({\rm{D}} = R\backslash \left\{ {k\pi ,k \in Z} \right\}.\)
B. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{2} + k\pi ,k \in Z} \right\}.\)
C. \({\rm{D}} = R\backslash \left\{ {\frac{\pi }{2} + k2\pi ,k \in Z} \right\}.\)
D. \({\rm{D}} = \emptyset .\)
A. \({\rm{D}} = \emptyset .\)
B. D = R
C. \({\rm{D}} = \left[ {\frac{\pi }{6} + k2\pi ;\frac{{5\pi }}{6} + k2\pi } \right],\,k \in Z.\)
D. \({\rm{D}} = \left[ {\frac{{5\pi }}{6} + k2\pi ;\frac{{13\pi }}{6} + k2\pi } \right],\,k \in Z.\)
A. \(y = - \,\,\sin x.\)
B. \(y = \cos x - \sin x.\)
C. \(y = \cos x + {\sin ^2}x.\)
D. \(y = \cos x\sin x.\)
A. \(y = \cos x + {\sin ^2}x.\)
B. \(y = \sin x + \cos x.\)
C. \(y = - \,\cos x.\)
D. \(y = \sin x.\cos 3x.\)
A. \(y = \cot 4x.\)
B. \(y = \frac{{\sin x + 1}}{{\cos x}}.\)
C. \(y = {\tan ^2}x.\)
D. \(y = \left| {\cot x} \right|.\)
A. \(y = 1 - {\sin ^2}x.\)
B. \(y = \left| {\cot x} \right|.{\sin ^2}x.\)
C. \(y = {x^2}\tan 2x - \cot x.\)
D. \(y = 1 + \left| {\cot x + \tan x} \right|.\)
A. \(y = \cos x.\)
B. \(y = \cos 2x.\)
C. \(y = {x^2}\cos x\)
D. \(y = \frac{1}{{\sin 2x}}.\)
A. \(T = \frac{{2\pi }}{5}.\)
B. \(T = \frac{{5\pi }}{2}.\)
C. \(T = \frac{\pi }{2}.\)
D. \(T = \frac{\pi }{8}.\)
A. \(T=4\pi\)
B. \(T=2\pi\)
C. \(T=-2\pi\)
D. \(T=\pi\)
A. \(T = \frac{1}{{50}}.\)
B. \(T = \frac{1}{{100}}.\)
C. \(T = \frac{\pi }{{50}}.\)
D. \(T = 200{\pi ^2}.\)
A. \(T=4\pi\)
B. \(T=\pi\)
C. \(T=3\pi\)
D. \(T=2\pi\)
A. \(y = {\cos ^3}x.\)
B. \(y = \sin \,\frac{x}{2}\cos \frac{{\,x}}{2}.\)
C. \(y = {\sin ^2}\left( {x + 2} \right).\)
D. \(y = {\cos ^2}\left( {\frac{x}{2} + 1} \right).\)
A. \(y=\cos x\) và \(y = \cot \frac{x}{2}.\)
B. \(y=\sin x\) và \(y=\tan 2x\)
C. \(y = \sin \frac{x}{2}\) và \(y = \cos \frac{x}{2}.\)
D. \(y=\tan 2x\) và \(y=\cot 2x\)
A. M = 1, m = - 5
B. M = 3, m = 1
C. M = 2, m = - 2
D. M = 0, m = - 2
A. 3
B. 4
C. 5
D. 6
A. \(m = - 2016\sqrt 2 .\)
B. \(m = - \sqrt 2 .\)
C. m = - 1
D. \(m = - 2017\sqrt 2 .\)
A. \(m = \frac{1}{2}.\)
B. \(m = \frac{1}{{\sqrt 2 }}.\)
C. m = 1
D. \(m = \sqrt 2 .\)
A. P = 4
B. \(P = 2\sqrt 2 .\)
C. \(P = \sqrt 2 .\)
D. P = 2
A. \(T = \left[ { - 2;2} \right].\)
B. \(T = \left[ { - 4034;4034} \right].\)
C. \(T = \left[ { - \sqrt 2 ;\sqrt 2 } \right].\)
D. \(T = \left[ {0;\sqrt 2 } \right].\)
A. 1
B. 2
C. 3
D. 4
A. \(M = 3,{\rm{ }}m = - 1.\)
B. \(M = 1,{\rm{ }}m = - 1.\)
C. \(M = 2,{\rm{ }}m = - 2.\)
D. \(M = 0,{\rm{ }}m = - 2.\)
A. \(M = \sqrt 2 .\)
B. \(M = \sqrt 2 - 1 .\)
C. \(M = \sqrt 2 + 1 .\)
D. \(M = \sqrt 2 + 2 .\)
A. \(x = k\pi {\rm{ }}\left( {k \in Z} \right).\)
B. \(x = \frac{{2\pi }}{3} + \frac{{k3\pi }}{2}{\rm{ }}\left( {k \in Z} \right).\)
C. \(x = \frac{\pi }{3} + k\pi {\rm{ }}\left( {k \in Z} \right).\)
D. \(x = \frac{\pi }{2} + \frac{{k3\pi }}{2}{\rm{ }}\left( {k \in Z} \right).\)
A. 2
B. 4
C. 6
D. 7
A. 4034
B. 4035
C. 641
D. 642
A. \(\frac{\pi }{9}\)
B. \(-\frac{\pi }{6}\)
C. \(\frac{\pi }{6}\)
D. \(-\frac{\pi }{9}\)
A. 2
B. 3
C. 4
D. 5
A. \(T = 3\pi .\)
B. \(T = \frac{{5\pi }}{2}.\)
C. \(T = 2\pi .\)
D. \(T = \pi .\)
A. 00
B. - 300
C. 300
D. - 600
A. \(x = \frac{1}{3} + \frac{{5\pi }}{{18}} + k\frac{\pi }{3}{\rm{ }}\left( {k \in Z} \right).\)
B.
\(x = \frac{1}{3} + \frac{\pi }{{18}} + k\frac{\pi }{3}{\rm{ }}\left( {k \in Z} \right).\)
C. \(x = \frac{{5\pi }}{{18}} + k\frac{\pi }{3}{\rm{ }}\left( {k \in Z} \right).\)
D. \(x = \frac{1}{3} - \frac{\pi }{6} + k\pi {\rm{ }}\left( {k \in Z} \right).\)
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