MCQ
Fill in the Blanks
`(hat"i" + hat"j" - hat"k")*(hat"i" - hat"j" + hat"k")` = ______
Options
`hat"i" - hat"j" - hat"k"`
1
−1
`−hat"j" + hat"k"`
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Solution
−1
Explanation:
`(hat"i" + hat"j" - hat"k")*(hat"i" - hat"j" + hat"k")`
= 1 + 1 (- 1) + (- 1) (1)
= 1 - 1 - 1
= - 1
Concept: Representation of Vector
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