Q2
Show that the following pairs of planes are at right angles to each other:

(i) 3x-5y+3z-1=0 and 2x+3y+3z=7
(ii) r^→(2i^{^}+6j^{^}+6k^{^}) =13 and r^→(3i^{^}+4j^{^} -5k^{^}) +7=0.

Solution

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