A) \[\theta \]
B) \[2\theta \]
C) \[\frac{\theta }{2}\]
D) None of these
Correct Answer: A
Solution :
Let angle between both the lines is \[\alpha \], then \[\alpha ={{\tan }^{-1}}\left( \frac{2\sqrt{{{h}^{2}}-ab}}{a+b} \right)={{\tan }^{-1}}\left( \frac{2\sqrt{{{\sec }^{2}}\theta -1}}{1+1} \right)=\theta \] .
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