1.

The angle between the lines \[y=(2-\sqrt{3})x+5\] and \[y=(2+\sqrt{3})x-7\] is      [MP PET 1997]

A.            \[{{30}^{o}}\]
B.            \[{{60}^{o}}\]
C.            \[{{45}^{o}}\]
D.            \[{{90}^{o}}\]
Answer» C.            \[{{45}^{o}}\]


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