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Recent questions tagged scalar or dot products
+3
votes
1
answer
In a triangle ABC, if cos A /a = cos B /b and ∠ C =30. If a = 2cm then area of ΔABC is
asked
Apr 7, 2019
in
Class 12
by
kratos
cbse
areas related to circles
class-10
class-12
icse
triangles
scalar or dot products
constructions
vector
+3
votes
1
answer
The distance of the point having position vector -i + 2j + 6k from the straight line passing through the point , 6i + 3j - 4k is :
asked
Apr 5, 2019
in
Class 12
by
kratos
class-12
vector algebra
scalar triple product
cross product
vector
cbse
scalar or dot products
+1
vote
1
answer
Let vector a, b and c be three unit vectors such that vetor |a + b + c| = √3 and vector (a x b).(b x c) + (b x c).(c x a) + (c x a).(a x b) .
asked
Apr 4, 2019
in
JEE
by
kratos
vector algebra
cross product
jee
class-12
jee mains
scalar or dot products
vector
+2
votes
1
answer
Find the unit vector in the direction of vector AB if the position vectors of A, B are 2i + 4j - k, 4i +5j + k
asked
Apr 3, 2019
in
JEE
by
kratos
vector algebra
class-11
jee
scalar triple product
jee mains
vector
scalar or dot products
class-12
+3
votes
1
answer
Find the magnitude of each of the vectors (vector) a and (vector) b, having the same magnitude such that the angle
asked
Apr 1, 2019
in
Class 12
by
kratos
vector algebra
cbse
class-12
scalar or dot products
vector
+2
votes
1
answer
If vector a = 5i - j - 3k and vector b = i + 3j - 5k, then show that the vectors a + b and vector(a - b) are perpendicular.
asked
Mar 24, 2019
in
JEE
by
kratos
vector algebra
class-11
jee
vectors
class-12
jee mains
scalar or dot products
vector
+2
votes
1
answer
Prove that the middle points of the diagonals of a complete quadrilateral lie on the same straight line.
asked
Mar 22, 2019
in
JEE
by
kratos
quadrilaterals
class-8
jee
class-12
class-10
jee mains
scalar or dot products
coordinate geometry
vector
+3
votes
1
answer
Column - I Column – II (A) If vector a, b, c are three mutually perpendicular vectors where |vector a| = |vector b| = 2 and |vector c|
asked
Mar 13, 2019
in
JEE
by
kratos
isc
vector algebra
class-11
jee
vectors
class-12
icse
jee mains
scalar or dot products
vector
+3
votes
1
answer
Abhishek is moving with velocity 5i +3j + and Amit with velocity 2 i+ 4 j- 3k Find
asked
Mar 12, 2019
in
Class 12
by
kratos
the plane
vector algebra
class-11
vectors
vector
scalar or dot products
class-12
+3
votes
1
answer
If vector a = 2i – j + k and vector b = i – 3j – 5k, then find |vector (a × b)|.
asked
Mar 7, 2019
in
Class 12
by
kratos
applications of vector algebra
class-12
bseb model set
scalar or dot products
vector
straight line in space
+3
votes
1
answer
The projection of vector a on vector b if vector(a . b) = 8 and vector b = 2 i + 6 j + 3 k will be
asked
Mar 5, 2019
in
Class 12
by
kratos
scalar or dot products
class-12
vector
vector algebra
+1
vote
1
answer
If either a=0 or b =0 then a x b =0 Is the converse true? Justify your answer with an example.
asked
Mar 4, 2019
in
Class 12
by
kratos
cbse
vector algebra
cross product
class-12
scalar or dot products
vector
+2
votes
1
answer
If vector a = 2i + 2j - k and vector b = 6i - 3j + 2k, then vector(a.b) is equal to
asked
Mar 4, 2019
in
Class 12
by
kratos
vector algebra
applications of vector algebra
class-11
cross product
vector
scalar or dot products
class-12
+3
votes
1
answer
Let vector α = 3cap i + cap j, vector β = 2cap i - cap j + 3cap k vector β = vector β1 - vector β2,
asked
Mar 1, 2019
in
JEE
by
kratos
cbse
vector algebra
work energy and power
jee
class-12
scalar or dot products
vector
+3
votes
1
answer
Show that the vector 2i - j + k and i - 3j - 5k are at right angles.
asked
Feb 27, 2019
in
Class 12
by
kratos
vector algebra
bseb model set
vector
scalar or dot products
class-12
+2
votes
1
answer
Vector r which is equally inclined to coordinate axes such that |r| = 15√3 is (A) i + j + k
asked
Feb 27, 2019
in
JEE
by
kratos
vector algebra
class-11
jee
vectors
product of vectors
class-12
cross or vector
jee mains
scalar or dot products
vector
+1
vote
1
answer
Find the area of triangle whose adjacent sides are 2i - 3j +5k, -i + 4j + 2k
asked
Feb 23, 2019
in
Class 12
by
kratos
cbse
cross product
scalar triple product
vector
scalar or dot products
class-12
+2
votes
1
answer
The projection of i + 3 j + k on 2 i - 3 j + 6 k is equal to which of the following ?
asked
Feb 21, 2019
in
Class 12
by
kratos
scalar or dot products
class-12
vector
+1
vote
1
answer
If |vector(a + b)| = |vector(a - b)|, then (a) vector(a || a) (b) vector a is perpendicular to vector b (c) vector(|a| = |b|) (d) None of these
asked
Feb 21, 2019
in
Class 12
by
kratos
class-11
class-12
bseb model set
scalar or dot products
vector
three dimensional geometry
+2
votes
1
answer
The projection of vector A = 2i + 2j + 5k on to vector B = i - j is: (A) Zero
asked
Feb 18, 2019
in
Class 12
by
kratos
vector algebra
applications of vector algebra
class-11
class-12
scalar or dot products
vector
three dimensional geometry
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