Write the Vector V in the Form Ai + Bj $$\| v \| = 7 , \alpha = 270 ^ { \circ }$$

Write the vector v in the form ai + bj, given its magnitude v and the angle  it makes with the positive x-axis.
- $$\| v \| = 7 , \alpha = 270 ^ { \circ }$$

A) $\mathbf { v } = - 7 \mathbf { i }$
B) $\mathbf { v } = - 7 \mathrm { i } + 7 \mathrm { j } )$
C) $\mathbf { v } = - 7 \mathbf { i } - 7 \mathbf { j }$
D) $\mathbf { v } = - 7 \mathrm { j }$

Correct Answer:

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