if\overrightarrow a \overrightarrow b \overrightarrow c→ are three – InterviewSolution

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1.	if\overrightarrow a \overrightarrow b \overrightarrow c→ are three unit vectors such that\overrightarrow a+\overrightarrow b+\overrightarrow c=0 then \overrightarrow a.\overrightarrow b+\overrightarrow b.\overrightarrow c+\overrightarrow c.\overrightarrow{} is equal to
Answer» if\overrightarrow a \overrightarrow b \overrightarrow c→ are three unit vectors such that\overrightarrow a+\overrightarrow b+\overrightarrow c=0 then \overrightarrow a.\overrightarrow b+\overrightarrow b.\overrightarrow c+\overrightarrow c.\overrightarrow{} is equal to

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