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If a unit vector is represented by 0.5ha...

If a unit vector is represented by `0.5hati + 0.8hatj + chatk` the value of c is

A

1

B

`sqrt(0.11)`

C

`sqrt(0.01)`

D

`sqrt(0.39)`

Text Solution

Verified by Experts

The correct Answer is:
B
Magnitude of unit vector `=1`
`implies sqrt((0.5)^(2)+(0.8)^(2)+c^(2))=1`
By solving we get `c= sqrt(0.11)`
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