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Mathematics
Mathematics
Problem
A vector has components
A
x
=
9
units
A_x=9\,\text{units}
A
x
=
9
units
and
A
y
=
−
12
units
A_y=-12\,\text{units}
A
y
=
−
12
units
. a. (i) Calculate the unit vector along
A
\mathbf{A}
A
. b. (ii) Determine the angle made by
A
\mathbf{A}
A
with the positive x–axis (answer in degrees,
0
∘
≤
θ
<
360
∘
0^\circ\le \theta<360^\circ
0
∘
≤
θ
<
36
0
∘
).
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