Asked by namaina2005 | 28th Dec, 2009, 04:01: PM

Expert Answer:

Angle between two lines is given by

tan θ = (m2-m1)/(1+m1m2)

For lines x/a+y/b=1 and x/b-y/a=1 

m1 = -b/a and m2 = a/b

lines are perpendicular to each other

Try the other part similarly

Answered by  | 28th Dec, 2009, 04:20: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.