• Atempt any Two parts. 15x2=10 (a)...
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• Atempt any Two parts. 15x2=10 (a) Show that the vectors i+j-k, -i- ; -2k and – 3i +3j are perpendicular.

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fon vectons to be perbend iculan ( 0 mathrm{b} / mathrm{w} ) them is ( mathrm{so}^{-} ) ( Rightarrow cos theta=0 ) F) ( cdot(a, b)=0 ) ( begin{aligned} text { flev }, & a cdot b=-1-1+2 &=0 end{aligned} ) ( therefore ) Jst & 2 nd one perpendicular. ( vec{b} cdot vec{c}=3-3=0 ) =) Tha ( & ) 3ra ar perpendiculan. ( a^{2} cdot vec{c}=-3+3=0 ) ( therefore ) af ( C ) ar perpendicular.
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