Question

13. If a=8, b=-3 and c= -1 , verify the following. (i) {( a x b) x c} = { a x ( b x c) } (ii) c x ( a – b ) = c x a – c x b

Answer 1

Answer:

Find the direction cosines of the vector a and hence prove that, ... η unit vector perpendicular to both a & b , then, a X b = | a | | b | η Sinθ a θ η b ... ( i ) a x b ( ii ) | a x b | ( iii ) sinθ where θ is the angle between a & b ... ( a + b ) ○ {( b x c ) + ( b x a ) + 0 + ( c x a ) } ... ( a x b ) + ( a x c ) + ( b x c ) + ( b x a ) + ( c x a ) + ( c x b ).

Missing: 8, ‎| Must include: 8,

Explanation:

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Answer 2

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