gaokao 2020 Q11

gaokao · China · national-III-arts 5 marks Sine and Cosine Rules Multi-step composite figure problem
In $\triangle A B C$, $\cos C = \frac { 2 } { 3 } , A C = 4 , B C = 3$. Then $\tan B =$
A. $\sqrt { 5 }$
B. $2 \sqrt { 5 }$
C. $4 \sqrt { 5 }$
D. $8 \sqrt { 5 }$
In $\triangle A B C$, $\cos C = \frac { 2 } { 3 } , A C = 4 , B C = 3$. Then $\tan B =$\\
A. $\sqrt { 5 }$\\
B. $2 \sqrt { 5 }$\\
C. $4 \sqrt { 5 }$\\
D. $8 \sqrt { 5 }$