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f vec(a) is any vector , then -...

f `vec(a)` is any vector , then -

A

` (vec(a).hat(i))hat(i)+(vec(a).hat(j)) hat(j) + (veca.hat(k))hat(k) = vec(a)`

B

` (vec(a).hat(i))^(2)+(vec(a).hat(j)) ^(2)+ (vec(a) . hat(k))^(2)= |vec(a)|^(2)`

C

` hat (i)xx (vec(a)xx hat(j)) + hat(j)xx (vec(a) xx hat(j))+ hat(k) xx (vec(a)xxvec(k)) = 2 vec(a)`

D

all of the above

Text Solution

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The correct Answer is:
A,B,C,D
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