Đề online: Luyện tập giá trị lượng giác của góc -...

A \(P = \sqrt 3 \)                          

B \(P = \frac{{\sqrt 3 }}{2}\)                               

C \(P = 1\)                                  

D \(P = 0\)

A \(\tan C = \frac{1}{{\sqrt 3 }}\)                

B \(\sin C = \frac{{\sqrt 3 }}{2}\)            

C \(\cos C = \frac{1}{2}\)

D \(\cot C = \frac{1}{{\sqrt 3 }}\)

A \(\cos \alpha  < 0\)    

B    \(\sin \alpha  < 0\)

C \(\tan \alpha  < 0\)  

D \(\cot \alpha  < 0\)

A \({\rm{co}}{{\rm{s}}^2}\frac{\alpha }{2} + {\sin ^2}\frac{\alpha }{2} = \frac{1}{2}\)

B \({\rm{co}}{{\rm{s}}^2}\frac{\alpha }{3} + {\sin ^2}\frac{\alpha }{3} = \frac{1}{3}\)

C \({\rm{co}}{{\rm{s}}^2}\frac{\alpha }{4} + {\sin ^2}\frac{\alpha }{4} = \frac{1}{4}\)

D \(5\left( {{\rm{co}}{{\rm{s}}^2}\frac{\alpha }{5} + {{\sin }^2}\frac{\alpha }{5}} \right) = 5\)\(\)

A \(\left( {\overrightarrow {MN} ,\overrightarrow {MP} } \right)\)

B \(\left( {\overrightarrow {MN} ,\overrightarrow {NP} } \right)\)

C \(\left( {\overrightarrow {MO} ,\overrightarrow {ON} } \right)\)

D \(\left( {\overrightarrow {MN} ,\overrightarrow {OP} } \right)\) 

A \(S = 0\)           

B \(S = 1.\)                      

C \(S = 2.\)          

D \(S = 4.\)

A \({120^o}\)      

B \({360^o}\)                                    

C \({270^o}\)

D \({240^o}\)

A \(P = \frac{{25}}{9}.\)                         

B \(P = \frac{9}{{25}}.\)

C \(P = \frac{{11}}{9}.\)

D \(P = \frac{9}{{11}}.\)             

A \(\sin \angle BAH = \frac{{\sqrt 3 }}{2}\)                  

B \(\sin \angle ABC = \frac{{\sqrt 3 }}{2}\)                 

C \(\cos \angle BAH = \frac{1}{{\sqrt 3 }}\)       

D \(\sin \angle AHC = \frac{1}{2}\)

A \(P = 0\)

B \(P = 1\)

C \(P =  - 1\)        

D \(P =  2\)        

A \(A = \frac{{10}}{{26}}.\)

B \(A = \frac{{100}}{{26}}.\)      

C \(A = \frac{{101}}{{26}}.\)      

D \(A = \frac{{50}}{{26}}.\)

A \(\cot \alpha  = \frac{{\sqrt 5 }}{4}.\)   

B \(\cot \alpha  = \frac{{\sqrt 2 }}{4}.\)               

C \(\cot \alpha  = \frac{{\sqrt 3 }}{4}.\)

D \(\cot \alpha  = \frac{{\sqrt 2 }}{2}.\)

A \({360^o}\)  

B \({160^o}\)      

C \({100^o}\)                  

D \({80^o}\)

A \(\frac{1}{4}\)              

B \(\frac{3}{4}\)              

C \(\frac{5}{4}\)              

D \(\frac{7}{4}\)

A \({315^o}\)      

B \({225^o}\)                  

C \({105^o}\)                  

D \({45^o}\)

A \(\frac{{ - 19}}{{13}}\)             

B \(\frac{{19}}{{13}}\)                

C \(\frac{{25}}{{13}}\)

D \(\frac{{ - 25}}{{13}}\)

A \( - 1\)             

B \(0\)                  

C \(1\)

D \(2\)

A \(0\)      

B \(1\)

C \( - 1\)

D \(2\)

A \(\frac{{{k^2}}}{2}\)                

B \(\frac{{{k^2}}}{3}\)    

C \(\frac{k}{2}\)

D \(\frac{k}{3}\)