MCQ
$\hat{i} \cdot(\hat{j} \times \hat{k})+\hat{j} \cdot(\hat{i} \times \hat{k})+k \cdot(\hat{i} \times \hat{j})$ का मान है$-$
  • A
    $0$
  • B
    $-1$
  • $1$
  • D
    $3$

Answer

Correct option: C.
$1$
$\hat{i} \cdot(\hat{j} \times \hat{k})+\hat{j} \cdot(\hat{i} \times \hat{k})+k \cdot(\hat{i} \times \hat{j})$
$\Rightarrow \hat{i} \cdot(\hat{i})+\hat{j} \cdot(-\hat{j})+k \cdot(\hat{k})$
$\Rightarrow 1-1+1=1$
अतः सही विकल्प $(C)$ है।

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