Câu hỏi trắc nghiệm (10 câu):
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- A. \(2 + k\pi \)
- B. \(k\pi \)
- C. \(\arctan 2 + k\pi \)
- D. \(\arctan \dfrac{1}{2} + k\pi \)
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- A. \(\sin x = - \dfrac{1}{2}\)
- B. \(\cot x = - \dfrac{{\sqrt 3 }}{3}\)
- C. \(\tan x = \sqrt 3 \)
- D. \(\cos x = - \dfrac{1}{2}\)
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- A. \(\dfrac{\pi }{3} + k\pi \)
- B. \(\dfrac{\pi }{6} + k\pi \)
- C. \(\dfrac{{5\pi }}{6} + k\pi \)
- D. \( - \dfrac{\pi }{6} + k2\pi \)
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- A. \(\dfrac{\pi }{2} + k\pi \)
- B. \( - \dfrac{\pi }{4} + k\pi \)
- C. \(\dfrac{{3\pi }}{4} + k2\pi \)
- D. \(\dfrac{\pi }{4} + k\pi \)
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- A. \(x = - \dfrac{\pi }{6} + k\pi \)
- B. \(x = \dfrac{\pi }{6} + k\pi \)
- C. Vô nghiệm
- D. \(x = \pm \dfrac{\pi }{3} + k\pi \)
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Câu 6:
Tìm nghiệm của phương trình \(\cot \left( {x - \dfrac{\pi }{3}} \right) = \dfrac{{\sqrt 3 }}{3}\).
- A. \(x = \dfrac{\pi }{3} + k\pi ,k \in Z\).
- B. \(x = \dfrac{\pi }{2} + k2\pi ,k \in Z\).
- C. \(x = \dfrac{{2\pi }}{3} + k\pi ,k \in Z\).
- D. \(x = k\pi ,k \in Z\).
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- A. \(x = 3 + {\rm{arc}}\cot 4 + k\pi \)
- B. \(x = 4 + {\rm{arc}}\cot 3 + k\pi \)
- C. \(x = 3 + {\rm{arc}}\cot 4 + k2\pi \)
- D. \(x = 4 + {\rm{arc}}\cot 3 + k2\pi \)
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- A. \(x = \dfrac{\pi }{3} + k3\pi \)
- B. \(x = \dfrac{\pi }{3} + k4\pi \)
- C. \(x = \dfrac{\pi }{3} + k2\pi \)
- D. \(x = \dfrac{\pi }{3} + k\pi \)
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- A. \(x = \frac{{k\pi }}{2}\,\,\left( {k \in Z} \right)\)
- B. \(x = k\pi \,\,\left( {k \in Z} \right)\)
- C. \(x = k2\pi \,\,\left( {k \in Z} \right)\)
- D. Kết quả khác
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- A. \(x = \frac{{k\pi }}{2}\,\,\left( {k \in Z} \right)\)
- B. \(x = k\pi \,\,\left( {k \in Z} \right)\)
- C. \(x = k2\pi \,\,\left( {k \in Z} \right)\)
- D. Kết quả khác
