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Question
If `veca` is a non-zero vector, then `(veca.hati).hati + (veca.hatj).hatj + (veca.hatk).hatk` ______.
Fill in the Blanks
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Solution
If `veca` is a non-zero vector, then `(veca.hati).hati + (veca.hatj).hatj + (veca.hatk).hatk` `underlinebb(veca)`.
Explanation:
`(veca.hati) hati + (veca.hatj) hatj + (veca.hatk) hatk`
= `a_1hati + a_2hatj + a_3hatk` ...`[veca.hati = a_1,veca.hatj = a_2, veca.hatk = a_3]`
= `veca`
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