Find the value of `lambda` for which the given planes are perpendicular to the each othe
Channel: Doubtnut
Date: 19/04/2020

Find the value of `lambda` for which the given planes are perpendicular to the each other:   i) `vecr.(2hati-hatj-lambdak)=7` and `vecr.(3hati+2hatj+2hatk)=9`   ii) `vecr.(lambdahati+2hatj+3hatk)=5` and `vecr.(hati+2hatj-7hatk)+11=0`