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Arnapurna Paikaray
Subject: Maths
, asked on 20/3/18
Solve . Dont send links please
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 19/3/18
Q. If the position vector of A, B, C are 2
i
+ 4
j
—
k
, 4
i
+ 5
j
+
k
and 3
i
+ 6
j
— 3
k
respectively, then show that triangle ABC is right angle.
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 19/3/18
Q.):- If
→
a
,
→
b
,
→
c
are three vectors such that
→
a
≠
0
and
→
a
.
→
b
=
→
a
.
→
c
and
→
a
×
→
b
=
→
a
×
→
c
; prove that
→
b
=
→
c
.
Answer
2
Tithi
Subject: Maths
, asked on 19/3/18
Q
.
a
→
⊥
b
→
⊥
c
→
,
P
r
o
v
e
t
h
a
t
a
→
·
b
→
×
c
→
=
a
2
b
2
c
2
Answer
2
Ranjit Singh
Subject: Maths
, asked on 18/3/18
Q-20)
I
f
a
→
=
3
i
^
+
4
j
^
+
5
k
^
a
n
d
b
→
=
2
i
^
+
j
^
-
4
k
^
t
h
e
n
e
x
p
r
e
s
s
b
→
i
n
t
h
e
f
o
r
m
o
f
b
→
=
c
→
+
d
→
w
h
e
r
e
c
→
i
s
∥
a
→
a
n
d
d
→
i
s
p
e
r
p
e
n
d
i
c
u
l
a
r
t
o
a
→
.
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 18/3/18
No links please:
(ii) If
a
→
,
,
b
→
,
c
→
are unit vectors satisfying the condition
a
→
+
b
→
+
c
→
=
0
then show that
a
→
.
b
→
+
b
→
.
c
→
+
c
→
.
a
→
=
-
3
2
Answer
2
Shubhrajyoti Ghosh
Subject: Maths
, asked on 18/3/18
No links please:
(i) If
2
a
→
+
3
b
→
+
c
→
=
0
,
→
then show that
a
→
×
b
→
+
b
→
×
c
→
+
c
→
×
a
→
=
3
b
→
×
c
→
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 17/3/18
No links please
Qii). If the vectors
a
→
+
b
→
,
b
→
+
c
→
,
c
→
+
a
→
are coplanar, then prove that the vectors
a
→
,
b
→
,
c
→
are coplanar.
Answer
1
Deepak Vyas
Subject: Maths
, asked on 17/3/18
?nswer it
Answer
1
Vibhav
Subject: Maths
, asked on 16/3/18
Please explain the underlined steps???
Also how is (a vector cross i cap)^2 calculated???
Does while square of Vectors exist???
Isnt square only possible of magnitude of Vectors and Not vectors themselves????
Answer
1
Chaitanya Kapoor
Subject: Maths
, asked on 15/3/18
Solve
44.
The two adjacent sides of a parallelogram are
2
i
^
-
4
j
^
-
5
k
^
a
n
d
2
i
^
+
2
j
^
+
3
k
^
. Find the two unit vectors parallel to its diagonals. Using the diagonal vectors, find the area of the parallelogram.
Answer
1
Chaitanya Kapoor
Subject: Maths
, asked on 15/3/18
Q
43
.
I
f
a
→
,
b
→
,
c
→
a
r
e
u
n
i
t
v
e
c
t
o
r
s
s
u
c
h
t
h
a
t
a
→
.
b
→
=
a
→
.
c
→
=
0
a
n
d
t
h
e
a
n
g
l
e
b
e
t
w
e
e
n
b
→
a
n
d
c
→
i
s
π
6
,
t
h
e
n
p
r
o
v
e
t
h
a
t
i
a
→
=
±
2
b
→
×
c
→
i
i
a
→
+
b
→
b
→
+
c
→
c
→
+
a
→
=
±
1
Answer
1
Chaitanya Kapoor
Subject: Maths
, asked on 15/3/18
Solve.it.dont send link i.have already referred to link and its.not at all explainatory
Q
42
.
F
o
r
t
h
r
e
e
v
e
c
t
o
r
s
a
→
,
b
→
,
a
n
d
c
→
i
f
a
→
×
b
→
=
c
→
a
n
d
a
→
×
c
→
=
b
→
,
t
h
e
n
p
r
o
v
e
t
h
a
t
a
→
,
b
→
,
a
n
d
c
→
a
r
e
m
u
t
u
a
l
l
y
p
e
r
p
e
n
d
i
c
u
l
a
r
v
e
c
t
o
r
s
,
b
→
=
c
→
a
n
d
a
→
=
1
.
Answer
1
Varnika Dhiman
Subject: Maths
, asked on 15/3/18
Q. Find a vector of magnitude 5 units, and parallel to the resultant of the vectors
a
¯
=
2
i
^
+
3
j
^
-
k
^
a
n
d
b
¯
=
i
^
-
2
j
^
+
k
^
Answer
2
Ashwini.. .
Subject: Maths
, asked on 14/3/18
Please answer fast
Q.2.
Represent graphically a displacement of 25 km,
60
°
(i) North to East (ii) East to North
Answer
1
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What are you looking for?
(ii) If are unit vectors satisfying the condition then show that
(i) If then show that
Qii). If the vectors are coplanar, then prove that the vectors are coplanar.
Also how is (a vector cross i cap)^2 calculated???
Does while square of Vectors exist???
Isnt square only possible of magnitude of Vectors and Not vectors themselves????
44. The two adjacent sides of a parallelogram are . Find the two unit vectors parallel to its diagonals. Using the diagonal vectors, find the area of the parallelogram.
Q.2. Represent graphically a displacement of 25 km,
(i) North to East (ii) East to North