Write the Vector V in the Form Ai + Bj $$\| \mathbf { v } \| = 7 , \quad \alpha = 60 ^ { \circ }$$

Multiple Choice

Write the vector v in the form ai + bj, given its magnitude v and the angle  it makes with the positive x-axis.
- $$\| \mathbf { v } \| = 7 , \quad \alpha = 60 ^ { \circ }$$

A) $v = 7 \left( - \frac { 7 } { 2 } i - \frac { 7 \sqrt { 3 } } { 2 } j \right)$
B) $v = 7 \left( \frac { 7 \sqrt { 3 } } { 2 } \mathrm { i } + \frac { 7 } { 2 } \mathrm { j } \right)$
C) $v = 7 \left( \frac { \sqrt { 2 } } { 2 } \mathrm { i } + \frac { \sqrt { 2 } } { 2 } \mathrm { j } \right)$
D) $v = 7 \left( \frac { 7 } { 2 } \mathrm { i } + \frac { 7 \sqrt { 3 } } { 2 } \mathrm { j } \right)$