JEE Main 2006 Mathematics question
The two lines , ; and , are perpendicular to each other if
Answer: (1)
Solution
Directions (a, 1, c) and (a', 1, c'). Perpendicular: aa' + 1 + cc' = 0 \Rightarrow aa' + cc' = -1, option (1).
The two lines , ; and , are perpendicular to each other if
Directions (a, 1, c) and (a', 1, c'). Perpendicular: aa' + 1 + cc' = 0 \Rightarrow aa' + cc' = -1, option (1).