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The direction cosines of a vector vecA a...

The direction cosines of a vector `vecA` are `cos alpha=(4)/(5sqrt(2)),cos beta =(1)/(sqrt(2)) and cos gamma=(3)/(5sqrt(2))` then the vector `vecA` is

A

`4 hat(i) + hat(j) + 3hat(k)`

B

`4 hat(i) + 5 hat(j) + 3hat(k)`

C

`4hat(i) - 5hat(j) - 3 hat(k)`

D

`hat(i) + hat(j) - hat(k)`

Text Solution

Verified by Experts

The correct Answer is:
B
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