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  • The value of iˆ.( ˆj × kˆ) + ˆj  (iˆ × kˆ) + kˆ  (iˆ × ˆj) is

Q18  The value of  \hat i ( \hat j \times \hat k ) + \hat j ( \hat i \times \hat k ) + \hat k ( \hat i \times \hat j ) is

 (A) 0

(B) –1

(C) 1

(D) 3

Answers (2)

best_answer

To find the value of  \hat i ( \hat j \times \hat k ) + \hat j ( \hat i \times \hat k ) + \hat k ( \hat i \times \hat j )

\\\hat i ( \hat j \times \hat k ) + \hat j ( \hat i \times \hat k ) + \hat k ( \hat i \times \hat j ) \\=\hat i.\hat i+\hat j(-\hat j)+\hat k.\hat k\\=1-1+1\\=1

Hence option C is correct.

Posted by

Pankaj Sanodiya

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A

 

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