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The two lines x=ay+b, z=cy+d and x= a' y...

The two lines `x=ay+b, z=cy+d` and `x= a' y+ b', z= c' y +d'` will be perpendicularm if and only if

A

`aa'+b b'+c c'=0`

B

`(a+a')(b+b')(c+c')=0`

C

`aa'+c c'+1=0`

D

`aa'+b b'+c c'+1=0`

Text Solution

Verified by Experts

The correct Answer is:
C
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