Find the Angle Between V and W $\mathbf { v } = \mathrm { i } + \mathrm { j }$

Multiple Choice

Find the angle between v and w. Round to one decimal place, if necessary.
- $\mathbf { v } = \mathrm { i } + \mathrm { j }$ and $\mathbf { w } = \mathrm { i } + \mathbf { j } - \mathbf { k }$

A) $66 ^ { \circ }$
B) $0 ^ { \circ }$
C) $35.3 ^ { \circ }$
D) $90 ^ { \circ }$