Given vectors A = r ^ ( cos ϕ + 3 z ) − ϕ ^ ( 2 r + 4 sin ϕ ) + z ^ ( r − 2 z ) B = − r ^ sin ϕ + z ^ cos ϕ find (a) θ AB at (2, π /2, 0) (b) A unit vector perpendicular to both A and B at (2, π /3, 1)
Given vectors A = r ^ ( cos ϕ + 3 z ) − ϕ ^ ( 2 r + 4 sin ϕ ) + z ^ ( r − 2 z ) B = − r ^ sin ϕ + z ^ cos ϕ find (a) θ AB at (2, π /2, 0) (b) A unit vector perpendicular to both A and B at (2, π /3, 1)
Solution Summary: The author calculates the angle of the vector theta_AB at (2,pi2,0).
A
=
r
^
(
cos
ϕ
+
3
z
)
−
ϕ
^
(
2
r
+
4
sin
ϕ
)
+
z
^
(
r
−
2
z
)
B
=
−
r
^
sin
ϕ
+
z
^
cos
ϕ
find
(a)θAB at (2, π/2, 0)
(b) A unit vector perpendicular to both A and B at (2, π/3, 1)
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
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