gaokao 2015 Q15

gaokao · China · jiangsu Sine and Cosine Rules Find a side length using the cosine rule

15. In $\triangle ABC$, given $A B = 2 , A C = 3 , A = 60 ^ { \circ }$ .
(1) Find the length of BC;
(2) Find the value of $\sin 2 C$.

15. In $\triangle ABC$, given $A B = 2 , A C = 3 , A = 60 ^ { \circ }$ .\\
(1) Find the length of BC;\\
(2) Find the value of $\sin 2 C$.\\