In the given figure, each of PA, QB and RC is perpendicular to Ac. If `AP=x,QB=z, RC=y, AB=a
Channel: Doubtnut
Date: 2020-01-03

In the given figure, each of PA, QB and RC is perpendicular to Ac. If `AP=x,QB=z, RC=y, AB=a and BC=b`, show that `(1)/(x)+(1)/(y)=(1)/(z)`