question_answer

The acute angle between the lines \[y=3\] and \[y=\sqrt{3}x+9\] is [RPET 1984, 87, 88]

A)            \[{{30}^{o}}\]                      

B)            \[{{60}^{o}}\]

C)            \[{{45}^{o}}\]                      

D)            \[{{90}^{o}}\]

Correct Answer: B

Solution :

It is clear from figure that angle \[={{60}^{o}}\]