Can the resultant of three vectors of unequal magnitudes be a zero vector?

If $\vec P = \vec Q$,then which of the following is $NOT$ correct?

The cosine values of the angles made by the vector $\vec{A} = \hat{i} + \hat{j} + \hat{k}$ with the $X$,$Y$,and $Z$ axes respectively are:

Define scalar and vector physical quantities with their examples.

The value of a unit vector in the direction of vector $\vec A = 5\hat i - 12\hat j$ is:

There are two vectors $\vec{A} = 6\hat{i} + 9\hat{j} - \hat{k}$ and $\vec{B} = 2\hat{i} + 3\hat{j} - p\hat{k}$ which have the same direction. The value of '$p$' is