Multivariable Calculus Quiz
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VECTORS AND GEOMETRY IN 3D
Question 1
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The angle between the planes
x
+
y
=
1
x+y=1
x
+
y
=
1
and
y
+
z
=
2
y+z=2
y
+
z
=
2
is
θ
\theta
θ
. What is the value of
cos
(
θ
)
\cos(\theta)
cos
(
θ
)
?
A
0
0
0
B
3
2
\frac{\sqrt{3}}{2}
2
3
C
2
2
\frac{\sqrt{2}}{2}
2
2
D
1
2
\frac{1}{2}
2
1
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