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If vecA+veB is a unit vector along x-axi...

If `vecA+veB` is a unit vector along x-axis and `vecA=hati-hatj+hatk`, then what is `vecB`?

A

`hatj+hatk`

B

`hatj+hatk`

C

`hati+hatj+hatk`

D

`hati+hatj-hatk`

Text Solution

Verified by Experts

The correct Answer is:
B
`vecA+vecB=hati`
`vecB=hati-vecA=jati(hati-hatj+hatk)-hatj-hatk`
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