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Byju's Answer
Standard XII
Mathematics
Foot of Perpendicular of a Point on a Line
For every poi...
Question
For every point P (x, y, z) on the x-axis (except the origin),
(a) x = 0, y = 0, z ≠ 0
(b) x = 0, z = 0, y ≠ 0
(c) y = 0, z = 0, x ≠ 0
(d) x = y = z = 0
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Solution
c
y
=
0
,
z
=
0
,
x
≠
0
Both
Y
and
Z
coordinates
on
each
point
of
the
x
-
axis
are
equal
to
zero
.
The
X
-
coordinate
on
the
origin
is
also
equal
to
zero
.
Therefore
,
the
Y
and
Z
coordinates
on
each
point
of
the
x
-
axis
,
except
the
origin
,
are
equal
to
zero
,
while
the
X
-
coordinate
is
non
-
zero
.
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Similar questions
Q.
For every point P (x, y, z) on the xy-plane,
(a) x = 0
(b) y = 0
(c) z = 0
(d) x = y = z = 0
Q.
The equation of y-axis in space is
(a) x = 0, z = 0
(b) x = 0, y = 0
(c) y = 0, z = 0
(d) y = 0
Q.
Equation y-axis is considered as
(a) x = 0, y = 0
(b) y = 0, z = 0
(c) z = 0, x = 0
(d) none of these
Q.
Three point charges
+
q
,
−
2
q
and
+
q
are placed at points
(
x
=
0
,
y
=
a
,
z
=
0
)
,
(
x
=
0
,
y
=
0
,
z
=
0
)
and
(
x
=
a
,
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=
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,
z
=
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)
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Q.
If
x
=
s
i
n
130
∘
c
o
s
80
∘
,
y
=
s
i
n
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∘
c
o
s
130
∘
,
z
=
1
+
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y
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which one of the following is true
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