Question

If `veca.hati = veca.(hati + hatj) = veca.(hati + hatj + hatk)` = 1, then `veca` is ______.

Options

• `hatk`

• `hati`

• `hatj`

• `hati + hatj + hatk`

Answer 1

If `veca.hati = veca.(hati + hatj) = veca.(hati + hatj + hatk)` = 1, then `veca` is `underlinebb(hati)`.

Explanation:

`hati.hati = hati.(hati + hatj)`

= `hati.(hati + hatj + hatk)`

1 = 1 + 0

= 1 + 0 + 0

= 1

Hence, a = `hati`.