Câu hỏi trắc nghiệm (10 câu):
-
- A. \(\sin 150^{\circ}=-\frac{\sqrt{3}}{2}\)
- B. \(\cos 150^{\circ}=\frac{\sqrt{3}}{2}\)
- C. \( \tan 150^{\circ}=-\frac{1}{\sqrt{3}}\)
- D. \(\cot 150^{\circ}=\sqrt{3}\)
-
Câu 2:
Khẳng định nào sau đây sai?
- A. \(\sin 90{}^\circ <\sin 100{}^\circ .\)
- B. \(\cos 95{}^\circ >\cos 100{}^\circ .\)
- C. \(\tan 85{}^\circ <\tan 125{}^\circ .\)
- D. \(\cos 145{}^\circ >\cos 125{}^\circ .\)
-
- A. \(P=\frac{105}{25}.\)
- B. \(P=\frac{107}{25}\).
- C. \(P=\frac{109}{25}.\)
- D. \(P=\frac{111}{25}.\)
-
- A. \(P=-\frac{19}{13}.\)
- B. \(P=\frac{19}{13}.\)
- C. \(P=\frac{25}{13}.\)
- D. \(P=-\frac{25}{13}.\)
-
- A. \(\tan \alpha =\frac{4}{3}.\)
- B. \(\tan \alpha =\frac{3}{4}.\)
- C. \(\tan \alpha =\frac{4}{5}.\)
- D. \(\tan \alpha =\frac{5}{4}.\)
-
- A. \(\sqrt 6 \)
- B. \(\sqrt 5 \)
- C. 2
- D. 2
-
- A. \(P=\frac{\sqrt{15}}{5}\)
- B. \(P=\frac{\sqrt{17}}{5}\)
- C. \(P=\frac{\sqrt{19}}{5}\)
- D. \(P=\frac{\sqrt{21}}{5}\)
-
- A. \(\cot \alpha=\frac{\sqrt{5}}{4}\)
- B. \(\cot \alpha=\frac{\sqrt{3}}{4}\)
- C. \(\cot \alpha=\frac{\sqrt{2}}{4}\)
- D. \(\cot \alpha=\frac{\sqrt{2}}{2}\)
-
- A. \(P=\frac{10}{26}\)
- B. \(P=\frac{100}{26}\)
- C. \(P=\frac{50}{26}\)
- D. \(P=\frac{101}{26}\)
-
- A. 0
- B. 1
- C. 2
- D. 4
