If $\overrightarrow{P} = 2\widehat{i} - 3\widehat{j} + \widehat{k}$ and $\overrightarrow{Q} = 3\widehat{i} - 2\widehat{j},$ then $\overrightarrow{P} \bullet \overrightarrow{Q}$ is

Question

Dr. Abubacker · Accepted Answer

(a) $\left( 2\widehat{i} - 3\widehat{j} + \widehat{k} \right).\left( 3\widehat{i} + 3\widehat{j} \right) = 6\left( \widehat{i}.\widehat{i} \right) - 6\left( \widehat{j}.\widehat{j} \right) = 0$

Q. If $\overrightarrow{P} = 2\widehat{i} - 3\widehat{j} + \widehat{k}$ and $\overrightarrow{Q} = 3\widehat{i} - 2\widehat{j},$ then $\overrightarrow{P} \bullet \overrightarrow{Q}$ is

Explanation

Reviewed by Dr. Abubacker

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