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Find the direction cosines and direction rations for the followingvectors (i)3 hati - 4hatj + 8 hatk (ii)3hati + hatj + hatk (iii)hatj (iv)5 hati - 3hatj - 48 hatk (v)3hati - 3hatk+ 4 hatj (vi)hati -hatk OR ( b) Showthat the pointswhoseposition vectors 4hati + 5hatj + hatk , - hatj - hatk , 3 hati + 9 hatj+ 4hatk and- 4 hati + 4 hatj + 4 hatk are conplanar. |
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Answer» (ii) ` sqrt 11` (III)0,1,0 (IV) `sqrt( 2338)` (v)`sqrt(34)` (vi) ` (-1)/SQRT2` (b) 3 |
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