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Let x-ysinalpha-zs inbeta=0,xs inalpha=z...

Let `x-ysinalpha-zs inbeta=0,xs inalpha=zs ingamma-y=0a n dxsinbeta+ysingamma-z=0` be the equations of the planes such that `alpha+beta+gamma=pi//2(w h e r ealpha,betaa n dgamma!=0)dot` Then show that there is a common line of intersection of the three given planes.

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