A. \(x = \frac{\pi }{4} + k\pi ,\left( {k \in Z} \right)\)
B. \(x = - \frac{\pi }{4} + k\pi ,\left( {k \in Z} \right)\)
C. \(x = \pm \frac{\pi }{4} + k2\pi ,\left( {k \in Z} \right)\)
D. \(x = \frac{\pi }{4} + k\frac{\pi }{2},\left( {k \in Z} \right)\)
A. 2
B. 4
C. 3
D. 1
A. (ABD).
B. (CMN).
C. (BCD).
D. (ACD).
A. \(x = \frac{\pi }{3} + k\pi ,\left( {k \in Z} \right).\)
B. \(x = \frac{{2\pi }}{3} + k2\pi ,\left( {k \in Z} \right).\)
C. \(x = \frac{\pi }{2} + k2\pi ,\left( {k \in Z} \right).\)
D. \(x = \frac{\pi }{3} + k2\pi ,\left( {k \in Z} \right).\)
A. 4
B. 3
C. 2
D. 6
A. \(SO, O\) là tâm hình bình hành \(ABCD\).
B. \(SD\)
C. \(SG, G\) là trung điểm \(AB\)
D. \(SF, F\) là trung điểm \(CD\)
A. 216
B. 120
C. 18
D. 720
A. 1;5;17;29;61.
B. 1;5;14;29;61.
C. 1;5;13;28;61..
D. 1;5;13;29;61
A. 24
B. 9
C. 18
D. 10
A. \(\Delta \,\,AOD.\)
B. \(\Delta \,\,CIE.\)
C. \(\Delta \,\,OBC.\)
D. \(\Delta \,\,OCI.\)
A. 130
B. 23
C. 253
D. 506
A. 6.5.4
B. 36
C. 6.6.6
D. 6.6.5
A.
\(\left[ \begin{array}{l}
x = k\frac{2}{3}\pi \\
x = \frac{\pi }{3} + k\frac{2}{3}\pi
\end{array} \right..\)
B.
\(\left[ \begin{array}{l}
x = k\pi \\
x = \frac{\pi }{3} + k\pi
\end{array} \right..\)
C.
\(\left[ \begin{array}{l}
x = k\frac{1}{2}\pi \\
x = \frac{\pi }{3} + k\frac{1}{2}\pi
\end{array} \right..\)
D.
\(\left[ \begin{array}{l}
x = k2\pi \\
x = \frac{\pi }{3} + k2\pi
\end{array} \right..\)
A. \( - 9C_9^7\)
B. \( - C_9^7\)
C. \(9C_9^7\)
D. \(C_9^7\)
A. \(\left( {2; + \infty } \right).\)
B. \(R\backslash \left\{ 2 \right\}.\)
C. \(R\)
D. \(\left[ {2; + \infty } \right).\)
A. 36
B. 2250
C. 5040
D. 181440.
A. \(x = \frac{\pi }{2}.\)
B. \(x = \frac{\pi }{3}.\)
C. \(x = \frac{\pi }{6}.\)
D. \(x = \frac{5\pi }{6}.\)
A. \(x \ne \pi + k3\pi ,\left( {k \in Z} \right)\)
B. \(x \ne - \frac{\pi }{{12}} + k3\pi ,\left( {k \in Z} \right)\)
C. \(x \ne - \frac{\pi }{2} + k6\pi ,\left( {k \in Z} \right)\)
D. \(x \ne \pi + k6\pi ,\left( {k \in Z} \right)\)
A. 256
B. 108
C. 36
D. 18
A. \(\frac{5}{{12}}.\)
B. \(\frac{2}{{15}}\)
C. \(\frac{7}{{45}}\)
D. \(\frac{8}{{15}}\)
A. \(\frac{2}{{15}}\)
B. \(\frac{6}{{25}}\)
C. \(\frac{8}{{15}}\)
D. \(\frac{4}{{15}}\)
A. \(N\left( {0; - 1} \right)\)
B. \(N\left( {2; - 3} \right)\)
C. \(N\left( { - 2;3} \right)\)
D. \(N\left( { - 1;0} \right)\)
A. \({\left( {x - 2} \right)^2} + {\left( {y - 4} \right)^2} = 16\)
B. \({\left( {x - 4} \right)^2} + {\left( {y - 2} \right)^2} = 16\)
C. \({\left( {x - 4} \right)^2} + {\left( {y - 2} \right)^2} = 4\)
D. \({\left( {x + 2} \right)^2} + {\left( {y + 4} \right)^2} = 16\)
A. \(\left( { - 3; - 2} \right)\)
B. \(\left( {3; - 2} \right)\)
C. \(\left( { - 2;3} \right)\)
D. \(\left( {2; - 3} \right)\)
A. 64
B. 16
C. 32
D. 20
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