Trắc nghiệm Công thức lượng giác có đáp án (Tổng hợp)

A. $\frac{1}{2}+\frac{\sqrt{3}}{2}$

B. $\frac{1}{2}-\frac{\sqrt{3}}{2}$

C. $\frac{1}{4}+\frac{\sqrt{3}}{2}$

D. $\frac{1}{4}-\frac{\sqrt{3}}{2}$

A. $\tan \left(\alpha +\beta \right)$

B. $\cot \left(\alpha +\beta \right)$

C. $\sin \left(\alpha +\beta \right)$

D. $\cos \left(\alpha +\beta \right)$

A. $A={\sin }^{2}a$

B. $A=1+{\cos }^{2}a$

C. $A=2{\sin }^{2}a$

D. $A=\cos 2a$

A. 2

B. 3

C. 0

D. 4

A. $\frac{5}{4}$

B. $\frac{3}{4}$

C. $\frac{1}{4}$

D. 0

A. $\frac{1}{2}$

B. $\frac{1}{\sqrt{2}}$

C. $\frac{\sqrt{2}}{3}$

D. 4

A. $\sin \alpha +\sin \beta$

B. $2\tan \alpha$

C. 2

D. $2\cot \alpha$

A. $A=\tan \left(x+\frac{\pi }{4}\right)$

B. $A=\cot \left(x+\frac{\pi }{4}\right)$

C. $A=\tan \left(x-\frac{\pi }{4}\right)$

D. $A=\cot \left(x-\frac{\pi }{4}\right)$

A. $S=\frac{13}{8}$

B. $S=\frac{11}{8}$

C. S = 2

D. S = 1

A. $\frac{101}{81}hay\frac{601}{504}$

B. $\frac{103}{81}hay\frac{603}{405}$

C. $\frac{105}{81}hay\frac{605}{504}$

D. $\frac{107}{81}hay\frac{607}{405}$

A. $2\sqrt{19}$

B. $-2\sqrt{19}$

C. $-\sqrt{19}$

D. $\sqrt{19}$

A. $\frac{\tan x+\tan y}{\cot x+\cot y}=\tan x.\tan y$

B. ${\left(\sqrt{\frac{1+\sin a}{1-\sin a}}-\sqrt{\frac{1-\sin a}{1+\sin a}}\right)}^2=4{\tan }^{2}a$

C. $\frac{\sin \alpha }{\cos \alpha +\sin \alpha }-\frac{\cos \alpha }{\cos \alpha -\sin \alpha }=\frac{1+{\cot }^2\alpha }{1-{\cot }^2\alpha }$

D. $\frac{\sin \alpha +\cos \alpha }{1-\cos \alpha }=\frac{2\cos \alpha }{\sin \alpha -\cos \alpha +1}$