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Questions  >>  CBSE XII  >>  Math  >>  Vector Algebra
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If $\overrightarrow{a},\overrightarrow{b},\overrightarrow{c}$ are unit vectors such that$\mid\overrightarrow{a}+\overrightarrow{b}+\overrightarrow{c}\mid=0$,then the value of $\overrightarrow{a}.\overrightarrow{b}+\overrightarrow{b}.\overrightarrow{c}+\overrightarrow{c}.\overrightarrow{a}$ is

\[(A)\;1\quad(B)\;3\quad(C)\;-\frac{3}{2}\quad(D)\;None\;of\;these\]

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