Question
If $ \vec{a}, \vec{b}, \vec{c} $ are unit vectors such that $ \vec{a} + \vec{b} + \vec{c} = \vec{0} $, then the value of $ \vec{a} \cdot \vec{b} + \vec{b} \cdot \vec{c} + \vec{c} \cdot \vec{a} $ is equal to –
If $ \vec{a}, \vec{b}, \vec{c} $ are unit vectors such that $ \vec{a} + \vec{b} + \vec{c} = \vec{0} $, then the value of $ \vec{a} \cdot \vec{b} + \vec{b} \cdot \vec{c} + \vec{c} \cdot \vec{a} $ is equal to –