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Recent questions tagged vectors
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Let a, b, c are three unit vectors, a + b + c = 0. Then a.b + b.c + c.a is (a) –3/2 (b) 0 (c) –1 (d) 1
asked
Apr 4, 2019
in
JEE
by
kratos
jee
vectors
jee mains
+1
vote
1
answer
The position vectors of the points A,B,C and D are 3i - 2j - k, 2i + 3j - 4k, -i + j + 2k and 4i + 5j + λk, respectively.
asked
Apr 4, 2019
in
JEE
by
kratos
class-12
jee mains
scalar triple product
jee
vector
vectors
+3
votes
1
answer
If vector a, vector b are two vectors then show that |vector a + vector b| ≤ | vector a | + | vector b |
asked
Apr 4, 2019
in
JEE
by
kratos
class-12
jee
vectors
jee mains
+1
vote
1
answer
Which of the following expressions are meaningfull question ?
asked
Apr 4, 2019
in
Mathematics
by
kratos
physics
vector algebra
maths
class-11
jee
vectors
calculus
jee mains
class-12
science
+3
votes
1
answer
The number of vectors of unit length perpendicular to vector a = (1, 1, 0) and b = (0, 1, 1) is
asked
Apr 4, 2019
in
JEE
by
kratos
jee
vectors
jee mains
+3
votes
1
answer
The work done by the force vector F = A(y^2i + 2x^2j), where A is a constant and x & y are in meters around the path shown is:
asked
Apr 4, 2019
in
JEE
by
kratos
work
energy
jee
vectors
class-11
jee mains
power
+1
vote
1
answer
Let u, v and w be the vectors such that u + v + w = 0. If |u| = 3, |v| = 4, |w| = 5, the value of u.v + v.w + w.u is
asked
Apr 4, 2019
in
JEE
by
kratos
jee
vectors
jee mains
+3
votes
1
answer
Please answer the following question
asked
Apr 4, 2019
in
JEE
by
kratos
jee
vectors
indefinite integration
jee mains
class-12
+3
votes
1
answer
If ABCD is a parallelogram and E is the mid point of AB, show by vector method that DE trisects and is trisected by AC.
asked
Apr 3, 2019
in
JEE
by
kratos
jee
vectors
class-9
class-12
jee mains
areas of parallelograms and triangles
+3
votes
1
answer
Show that the points are A(2i - j + k), B(i - 3j - 5k), C(3i - 4j - 4k) the vertices of a right angled triangle.
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Apr 3, 2019
in
JEE
by
kratos
class-12
class-11
jee mains
vector algebra
jee
vectors
+2
votes
1
answer
The three vectors i + j, j + k, k + i taken two at a time form three planes. The three unit vectors drawn perpendicular
asked
Apr 3, 2019
in
JEE
by
kratos
jee
vectors
jee mains
+1
vote
1
answer
Every March, the swallows return to San Juan Capistrano, California after their winter in the south.
asked
Apr 3, 2019
in
JEE
by
kratos
projectiles
jee
vectors
jee mains
+1
vote
1
answer
Let a, b and c be unit vectors such that a + b + c = 0, Which one of the following is correct? (a) a × b = b × c = c × a = 0
asked
Apr 3, 2019
in
JEE
by
kratos
jee
vectors
jee mains
+2
votes
1
answer
Let u = u1i + u2j + u3k be a unit vector in R3 and vector w = (1/√6)(i + j + k). Given that there exists a vector v
asked
Apr 2, 2019
in
JEE
by
kratos
jee
vectors
jee mains
vector algebra
+1
vote
1
answer
Show that a/sinA + b/sinB + c/sinC = 2R where R is the circumcentre of ΔABC
asked
Apr 1, 2019
in
JEE
by
kratos
properties of triangles
jee
vectors
matrices
determinants
jee mains
class-12
+3
votes
1
answer
Let a,b ,c be distinct non-negative numbers. If the vectors ai + aj + ck, i + k and ci + cj + bk lie in a plane, then c is
asked
Mar 31, 2019
in
JEE
by
kratos
vector algebra
applications of vector algebra
jee
vectors
jee mains
class-12
+1
vote
1
answer
Find 3-dimensional vectors v1, v2, v3 satisfying v1.v1 = 4, v1.v2 = – 2 and v1.v3 = 6, v2.v2 = 2, v2.v3 = 5 and v3.v3 = 29.
asked
Mar 31, 2019
in
Class 12
by
kratos
neet
class-11
jee
vectors
aiims
kcet
jee mains
kinetic theory
+1
vote
1
answer
The number of vectors of unit length perpendicular to vectors a = (1, 1, 0) and b = (0, 1, 1) is (a) 1 (b) 2 (c) 3 (d) infinite
asked
Mar 31, 2019
in
JEE
by
kratos
jee
vectors
jee mains
+3
votes
1
answer
If vector (a & b) are unit vectors inclined at an angle θ to each other , show
asked
Mar 31, 2019
in
JEE
by
kratos
class-11
scalar
jee
vectors
jee mains
+1
vote
1
answer
If a and b are unit vectors and θ the angle between them, show that sin(θ/2) = (1/2)|a – b|.
asked
Mar 30, 2019
in
JEE
by
kratos
jee
vectors
jee mains
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