Vector of length 3 sqrt(2) making angles of 45 and 90 degrees with the y- and z-axes

1. A.
   $\bar{r} = \pm 3\hat{i} + 3\hat{j}$
2. B.
   $\bar{r} = \hat{i} + \hat{j}$
3. C.
   $\bar{r} = \pm 2\hat{i} + 3\hat{j}$
4. D.
   $\bar{r} = \pm 5\hat{i} + \hat{j}$

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1. A.
   $\hat{i} \pm 3\hat{j}$
2. B.
   $\hat{i} \pm \hat{j}$
3. C.
   $-\hat{i} \pm \hat{j}$
4. D.
   $\pm 3\hat{i} + 3\hat{j}$

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