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
(C) 1
$\hat{i} \cdot(\hat{j} \times \hat{k})+\hat{j} \cdot(\hat{i} \times \hat{k})+k \cdot(\hat{i} \times \hat{j})$
$\begin{array}{l}\Rightarrow \quad \hat{i} \cdot(\hat{i})+\hat{j} \cdot(-\hat{j})+k \cdot(\hat{k}) \\ \Rightarrow \quad 1-1+1=1\end{array}$
अतः सही विकल्प (C) है।

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