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Question
Which of the following property is incorrect?
Which of the following property is incorrect?
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Solution
The correct option is C ^i.^j=^j.^k=^k.^i=1
^a.^b=|^a||^b|cosθ
^i and ^j make angle θ=90∘ , so cosθ=0
∴ ^i.^j=0
similarly,
^j.^k=^k.^i=^i.^j=0
^a.^b=|^a||^b|cosθ
^i and ^j make angle θ=90∘ , so cosθ=0
∴ ^i.^j=0
similarly,
^j.^k=^k.^i=^i.^j=0
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