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  • Provide Solution for RD Sharma Class 12 Chapter 23 Scalar or Dot Products Exercise Very Short Answer Question 21

Provide Solution for RD Sharma Class 12 Chapter 23 Scalar or Dot Products Exercise Very Short Answer Question 21

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Answer :-  1

Hint :- You must know the formula of projection of  \vec{a} \& \vec{b}

Given :-  \hat{\imath}+\hat{\jmath}+\hat{k} \& \hat{\jmath}

Solution :- projection  (\hat{\imath}+\hat{\jmath}+\hat{k})  along  \hat{j}

=\frac{(\hat{\imath}+\hat{\jmath}+\hat{k})(\hat{j})}{|\hat{j}|}

\Rightarrow  Projection of  (\hat{\imath}+\hat{\jmath}+\hat{k})  along  \hat{j} =\frac{0+1+0}{\sqrt{1}}=1

 

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