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Which of the following statements are tr...

Which of the following statements are true.
Statement-I: `(vec(r ).vec(i)) (vec(r )xx vec(i)) + (vec(r ).vec(j)) (vec(r ) xx vec(j)) + (vec(r ).vec(k)) (vec(r )xx vec(k)) = vec(r )`
Statement-II: If `vec(a) xx vec(b)= vec(0), vec(a).vec(b)=0`, then one of `vec(a),vec(b)` is a null vector.

A

only I

B

Only II

C

neither I nor II

D

both I and II

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-VECTOR (CROSS) PRODUCT OF TWO VECTORS-Practice Exercise
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