A) 1
B) 2
C) -1
D) -2
Correct Answer: C
Solution :
[c] \[y=(2+\sqrt{3})x+4\] ? (1) \[y=k\alpha +6\] ? (2) By (1) \[\Rightarrow {{m}_{1}}=(2+\sqrt{3});\] by (2) \[\Rightarrow {{m}_{2}}=k\] \[\therefore \tan 60{}^\circ =\frac{{{m}_{1}}-{{m}_{2}}}{1+{{m}_{1}}{{m}_{2}}}\Rightarrow k=-1\]
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