12th Class Mathematics Sample Paper Maths Olympiad Model Paper-1

  • question_answer
    For non-zero vectors \[\overrightarrow{a},\] \[\overrightarrow{b},\] \[\overrightarrow{c},\]\[|(\overrightarrow{a}\times \overrightarrow{b}).\overrightarrow{c}|=\overrightarrow{a}||\overrightarrow{b}||\overrightarrow{c}|\] holds,  if and only if:

    A)  \[\overrightarrow{a}.\overrightarrow{b}=0,\]\[\overrightarrow{b}.\overrightarrow{c}=0\]      

    B)  \[\overrightarrow{b}.\overrightarrow{c}=0,\]\[\overrightarrow{c}.\overrightarrow{a}=0\]

    C)  \[\overrightarrow{c}.\overrightarrow{a}=0,\]\[\overrightarrow{a}.\overrightarrow{b}=0\]      

    D)  \[\overrightarrow{a}.\overrightarrow{b}=\overrightarrow{b.}\overrightarrow{c}=\overrightarrow{c}.\overrightarrow{a}=0\]

    E)  None of these

    Correct Answer: D


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