Home › JEE Main › Mathematics › Coordinate Geometry › Two lines are perpendicular when the product of …
Two lines are perpendicular when the product of their slopes is:
AEqual two
BMinus one
CPlus one
DEqual zero
Answer & Solution
Correct answer: B. Minus one
1. Perpendicular lines meet at a right angle.
2. That condition can be written in terms of the two slopes.
3. It holds exactly when their product is minus one.
_Source: NCERT Class 11 Mathematics, Chapter 10, Straight Lines._
Related questions
The points (1, 5), (2, 3) and (minus 2, minus 11) are examined to check whether they are:If three points give an area of zero, what does that show?When the area formula gives a negative value for a triangle, you should:The area of the triangle with vertices (5, 2), (4, 7) and (7, minus 4) is:The area of the triangle with vertices (1, minus 1), (minus 4, 6) and (minus 3, minus 5) iBecause of that, the midpoint of the join of two points is found by:A midpoint divides a line segment in which ratio?The point dividing the join of (4, minus 3) and (8, 5) in the ratio 3 to 1 is: