MCQ
$(i × j). [(j × k) × (k × i)] ….$
- A$0$
- ✓$1$
- C$-1$
- D$2$
$\hat{j} \times \hat{k}=\hat{i}, \hat{i} \times \widehat{k}=-\hat{j}, \hat{i} \times \hat{j}=\widehat{k}$
Therefore,
$\hat{ i } \cdot \hat{ j } \times \widehat{ k })+\hat{ j } \cdot \hat{ i } \times \hat{ k })+\widehat{ k } \cdot(\hat{ i } \times \hat{ j })$
$=\hat{ i. } \hat{ i }+\hat{ j } \cdot(-\hat{ j })+\widehat{ k } \cdot \hat{ k }$
$=1-1+1=1$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.