Question

What is relation between slopes of perpendicular lines in terms of i

Answer 1

Hi friend,
If m1 and m2 are slopes of perpendicular lines then m1m2=-1 
as i²=-1 ⇒m1m2=i²
HOPE THIS HELPS YOU........

Answer 2

let be a1 and a2 is slope of perpendicular

lines then a1a2 = -1

so

i^2 = a1a2 = i^2