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Aditi Sharma
Subject: Maths
, asked on 14/3/18
Plz Solve @4
4. If a, b and C are mutually perpendicular unit vectors, then find the value of
2
a
b
+
b
+
c
Answer
2
Shubhrajyoti Ghosh
Subject: Maths
, asked on 13/3/18
No links please
(
i
i
)
U
sin
g
v
e
c
t
o
r
m
e
t
h
o
d
p
r
o
v
e
t
h
a
t
cos
(
A
-
B
)
=
C
o
s
A
C
o
s
B
+
S
i
n
A
S
i
n
B
.
Answer
2
Shubhrajyoti Ghosh
Subject: Maths
, asked on 13/3/18
No links please
i
i
A
B
C
D
E
F
i
s
r
e
g
u
l
a
r
h
e
x
a
g
o
n
s
u
c
h
t
h
a
t
A
B
→
=
a
,
→
B
C
→
=
b
.
→
T
h
e
n
f
i
n
d
E
F
,
→
C
D
→
,
B
F
→
a
n
d
B
D
→
i
n
t
e
r
m
s
o
f
a
→
a
n
d
b
→
.
E
F
→
=
-
b
→
;
C
D
→
=
b
→
-
a
;
→
B
F
→
=
b
→
-
2
a
;
→
B
D
→
=
2
b
→
-
a
→
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 13/3/18
Q
.
I
f
α
→
=
3
i
^
+
4
j
^
+
5
k
^
a
n
d
β
→
=
2
i
^
+
j
^
+
4
k
^
b
e
t
w
o
v
e
c
t
o
r
s
t
h
e
n
β
→
=
β
→
1
+
β
→
2
w
h
e
r
e
β
→
1
|
|
α
→
a
n
d
β
→
2
⊥
α
→
.
Answer
1
Aarathy.ajith
Subject: Maths
, asked on 27/2/18
Q
.
I
f
a
→
,
b
→
,
c
→
a
r
e
t
h
r
e
e
v
e
c
t
o
r
s
s
u
c
h
t
h
a
t
a
→
+
b
→
+
c
→
=
0
→
,
t
h
e
n
p
r
o
v
e
t
h
a
t
a
→
×
b
→
=
b
→
×
c
→
=
c
→
×
a
→
,
h
e
n
c
e
s
h
p
w
t
h
a
t
a
→
b
→
c
→
=
0
.
Answer
1
Vinuthna Terala
Subject: Maths
, asked on 25/2/18
Solve this :
20. Two vectors
j
^
+
k
^
and
3
i
^
-
j
^
+
4
k
^
represent two side vectors
AB
→
&
AC
→
respectively of the triangle ABC. Find the length of the median through A.
Answer
2
Juwan Jaffer
Subject: Maths
, asked on 20/2/18
Experts could u please answer the 20 th question after 'OR'
Answer
1
Yadav Ji
Subject: Maths
, asked on 16/2/18
what if two vectors a X b = 0 and a . b = 0then find what kind of vector are a b
Answer
2
Archana
Subject: Maths
, asked on 16/2/18
if a b c are mutually perpendicular vectors of equal magnitude, find the angle which the vector 2a+b+2c makes with vectors a,b and c
Answer
2
Vibhav
Subject: Maths
, asked on 14/2/18
If a VECTOR is parallel to +ve X axis its DRs will be 1,0,0 However If a VECTOR is parallel to -ve X Axis will its DRs be -1,0,0???
Is this because Vectors in 3D have a direction while a line doesnt have a direction???
Thats why a vector parallel to another but in opposite direction will have -ve DRs of that vector???
Answer
1
Shashwat Pratap Singh
Subject: Maths
, asked on 14/2/18
prove that a.{ (b+c)×(a+2b+3c)} = [a b c]
Answer
1
Yashashri Thakur
Subject: Maths
, asked on 13/2/18
Please kindly provide me the detailed solution. Q5
Q5. If
a
→
= a, then find the value of the following :
a
→
×
i
^
2
+
a
→
×
j
^
2
+
a
→
×
k
^
2
Answer
1
Vibhav
Subject: Maths
, asked on 12/2/18
Please solve this question
Q. If the vector
-
i
^
+
j
^
-
k
^
bisects the angle between the vector
c
→
and the vector
3
i
^
+
4
j
^
, then find the unit vector in the direction of
c
→
.
Answer
1
Ranjit Singh
Subject: Maths
, asked on 11/2/18
9
.
I
f
a
→
=
3
a
n
d
-
2
≤
k
≤
1
,
t
h
e
n
w
h
a
t
c
a
n
y
o
u
s
a
y
a
b
o
u
t
k
.
a
→
?
Answer
1
Vibhav
Subject: Maths
, asked on 11/2/18
Please solve Q5
Answer
1
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What are you looking for?
4. If a, b and C are mutually perpendicular unit vectors, then find the value of
20. Two vectors represent two side vectors respectively of the triangle ABC. Find the length of the median through A.
Is this because Vectors in 3D have a direction while a line doesnt have a direction???
Thats why a vector parallel to another but in opposite direction will have -ve DRs of that vector???
Q5. If = a, then find the value of the following :
Q. If the vector bisects the angle between the vector and the vector , then find the unit vector in the direction of .