The two lines x = my + n, z = py + q and x = m'y + n', z = p' y + q' are perpendicular to each other, if

### Question Asked by a Student from EXXAMM.com Team

Q 1563234145.     The two lines x = my + n, z = py + q and
x = m'y + n', z = p' y + q' are perpendicular
to each other, if
VIT 2015
A

mm' + pp' =1

B

m/m' + p/p' =-1

C

m/m' + p/p' =1

D

mm' + pp' =-1

#### HINT

These equations can be rewritten as  (x-n)/m = (y-0)/1 = (z-q)/(p)  (x-n')/m' = (y-0)/1 = (z-q')/(p')

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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