12. if the segment joining the points (a,b),(c,d) subtends a right ang – InterviewSolution

1.	12. if the segment joining the points (a,b),(c,d) subtends a right angle at the origin then prove ab+cd=0
Answer» 12. if the segment joining the points (a,b),(c,d) subtends a right angle at the origin then prove ab+cd=0

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