Two vectors $u$ and $v$ are parallel if and only if
- A$u$ and $v$ have the same direction
- B$u$ and $v$ have the opposite direction
- COne of them is a scalar multiple of the other
- DThe dot product of $u$ and $v$ is zero
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View SolutionFor any two vectors $\vec{a}$ and $\vec{b},$ we always have $|\vec{a}+\vec{b}| \leq|\vec{a}|+|\vec{b}|$ (triangle inequality).
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