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A \(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k\pi \\x = \pi  + k\pi \end{array} \right.\,\,\,\left( {k \in \mathbb{Z}} \right)\)

B \(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + \dfrac{{k2\pi }}{3}\\x = \pi  + \dfrac{{k2\pi }}{3}\end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

C \(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + \dfrac{{k\pi }}{2}\\x = \pi  + \dfrac{{k\pi }}{2}\end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

D \(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k2\pi \\x = \pi  + k2\pi \end{array} \right.\,\,\,\left( {k \in \mathbb{Z}} \right)\)

A \(x = k\pi ,\,\,x = \dfrac{\pi }{2} + k\pi \)hoặc \(x = \dfrac{\pi }{4} \pm \arccos \left( { - \dfrac{1}{{2\sqrt 2 }}} \right) + k\pi \)

B \(x = \dfrac{{k\pi }}{3},\,\,x = \dfrac{\pi }{2} + \dfrac{{k\pi }}{3}\)hoặc \(x = \dfrac{\pi }{4} \pm \arccos \left( { - \dfrac{1}{{2\sqrt 2 }}} \right) + \dfrac{{k\pi }}{3}\)

C \(x = \dfrac{{k2\pi }}{3},\,\,x = \dfrac{\pi }{2} + \dfrac{{k2\pi }}{3}\) hoặc \(x = \dfrac{\pi }{4} \pm \arccos \left( { - \dfrac{1}{{2\sqrt 2 }}} \right) + \dfrac{{k2\pi }}{3}\)

D \(x = k2\pi ,\,\,x = \frac{\pi }{2} + k2\pi \)hoặc \(x = \frac{\pi }{4} \pm \arccos \left( { - \frac{1}{{2\sqrt 2 }}} \right) + k2\pi \)

A \(x = \dfrac{\pi }{4} + k\pi ,\,\,x = \dfrac{{11\pi }}{{12}} + k\pi ,\,\,x =  - \dfrac{{5\pi }}{{12}} + k\pi \)

B \(x = \dfrac{\pi }{4} + \dfrac{{k2\pi }}{3};\,\,x = \dfrac{{11\pi }}{{12}} + \dfrac{{k2\pi }}{3};\,\,x =  - \dfrac{{5\pi }}{{12}} + \dfrac{{k2\pi }}{3}\)

C \(x = \dfrac{\pi }{4} + k2\pi ;\,\,x = \dfrac{{11\pi }}{{12}} + \dfrac{{k\pi }}{4};\,\,x =  - \dfrac{{5\pi }}{{12}} + k2\pi \)

D \(x = \dfrac{\pi }{4} + k2\pi ;\,\,x = \dfrac{{11\pi }}{{12}} + k2\pi ;\,\,x =  - \dfrac{{5\pi }}{{12}} + k2\pi \)

A \(3\)

B \(2\)

C \(1\)

D \(0\)

A \(\left[ \begin{array}{l}x =  - \dfrac{\pi }{4} + \arcsin \dfrac{{1 - \sqrt 2 }}{{\sqrt 2 }} + k2\pi \\x = \dfrac{{3\pi }}{4} - \arcsin \dfrac{{1 - \sqrt 2 }}{{\sqrt 2 }} + k2\pi \end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

B \(\left[ \begin{array}{l}x =  - \dfrac{\pi }{4} + \arcsin \left( {1 - \sqrt 2 } \right) + k2\pi \\x = \dfrac{{3\pi }}{4} - \arcsin \left( {1 - \sqrt 2 } \right) + k2\pi \end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

C \(\left[ \begin{array}{l}x =  - \dfrac{\pi }{4} + \arcsin \dfrac{{1 - \sqrt 2 }}{{\sqrt 2 }} + k2\pi \\x = \dfrac{\pi }{4} + \arcsin \dfrac{{1 - \sqrt 2 }}{{\sqrt 2 }} + k2\pi \end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

D \(\left[ \begin{array}{l}x = \dfrac{\pi }{4} + \arcsin \dfrac{{1 - \sqrt 2 }}{{\sqrt 2 }} + k2\pi \\x = \dfrac{{3\pi }}{4} - \arcsin \dfrac{{1 - \sqrt 2 }}{{\sqrt 2 }} + k2\pi \end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

A \(x = k\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

B \(x = \dfrac{{k\pi }}{2}\,\,\left( {k \in \mathbb{Z}} \right)\)

C \(x = k2\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

D \(x = \dfrac{\pi }{2} + k\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

A \(x =  - \dfrac{\pi }{4} + k\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

B \(x =  - \dfrac{\pi }{4} + k2\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

C \(x = \dfrac{{7\pi }}{{12}} + k\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

D \(x = \dfrac{\pi }{2} + k\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

A \(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k\pi \\x =  - \pi  + k\pi \end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

B \(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k3\pi \\x =  - \pi  + k3\pi \end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

C \(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k7\pi \\x =  - \pi  + k7\pi \end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

D \(\left[ \begin{array}{l}x = \dfrac{\pi }{2} + k2\pi \\x =  - \pi  + k2\pi \end{array} \right.\,\,\left( {k \in \mathbb{Z}} \right)\)

A \(\pi \)

B \(2\pi \)

C \(3\pi \)

D \(4\pi \)

A \(P = 3\)

B \(P = 3 + \dfrac{{\sqrt 2 }}{2}\)

C \(P = 0\)

D \(P = 2\)

A \(x = k\pi ,\,\,x =  - \dfrac{\pi }{4} + k2\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

B \(x =  - \dfrac{\pi }{4} + 2k\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

C \(x = k2\pi ,\,\,x = \dfrac{\pi }{4} + k2\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

D \(x = \pi  + k2\pi ,\,\,x =  - \dfrac{\pi }{2} + k2\pi \,\,\left( {k \in \mathbb{Z}} \right)\)

A \(1\)

B \(2\)

C \(3\)

D \(4\)

A \(1\)

B \( - \dfrac{{\sqrt 2 }}{2}\)

C \(\dfrac{{\sqrt 2 }}{2}\)

D \( \pm \dfrac{{\sqrt 2 }}{2}\)

A \(1\)

B \(2\)

C \(3\)

D \(4\)

A \(3\)

B \(4\)

C \(5\)

D \(6\)

A \(\dfrac{\pi }{2}\)

B \(\dfrac{{5\pi }}{4}\)

C \(\dfrac{{7\pi }}{2}\)

D \( - \dfrac{\pi }{4}\)

A 1 họ nghiêm

B 2 họ nghiêm

C 3 họ nghiêm

D 4 họ nghiêm

A \(\dfrac{{25\pi }}{6}\)

B \(6\pi \)

C Kết quả khác

D \(\dfrac{{11\pi }}{3}\)

A \( - 3 < m <  - 1 + \sqrt 2 \)

B \( - 3 < m \le  - 1 + \sqrt 2 \)

C \( - 1 < m \le  - 1 + \sqrt 2 \)

D \( - 1 < m <  - 1 + \sqrt 2 \)