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If the segment joining (a,b), (c,d) subtends a right angle at the origin,then 1)ac-bd=0 2)ac+bd=0 3)ab+cd=0 4)ab-cd=0

If the segment joining (a,b), (c,d) subtends a right angle at the origin,then
1)ac-bd=0    2)ac+bd=0
3)ab+cd=0   4)ab-cd=0

Grade:12th pass

1 Answers

Arun
25758 Points
4 years ago
Dear Faizan
 
that means – product od slopes will be  – 1
 
hence
 
[(b – 0) / (a – 0)] * [(d –0)/ (c –0)] = – 1
 
hence
 
bd / ac = – 1 
 
bd = – ac
 
bd + ac = 0
 
Option 2 is correct

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