MCQ
$\hat{i} .(\hat{j} \times \hat{k})+\hat{j} \cdot(\hat{i} \times \hat{k})+\hat{k} \cdot(\hat{i} \times \hat{j})$ નું મૂલ્ય ....
  • $1$
  • B
    $0$
  • C
    $-1$
  • D
    $3$

Answer

Correct option: A.
$1$
a
$\hat{i} \cdot(\hat{j} \times \hat{k})+\hat{j} \cdot(\hat{i} \times \hat{k})+\hat{k} \cdot(\hat{i} \times \hat{j})$

$=\hat{i} \cdot \hat{i}+\hat{j} \cdot(-\hat{j})+\hat{k}\cdot \hat{k}$

$=1-\hat{j} \cdot \hat{j}+1$

$=1-1+1$

$=1$

The correct answer is $A.$

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