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# Ask a Mathematics(Class XI-XII Tuition (PUC)) Question

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R

Rajmohan 09/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What are the properties of determinant?

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S

Shaun 09/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What do you mean by minor and cofactor of determinant?

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P

Praseem 09/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What do you mean by skew matrix?

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M

Momin 09/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What are the properties of adjoint of matrices?

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A

Arvind 09/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

Define inverse of matrix?

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R

Rajinder 09/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What do you mean by elementary transformation of matrix?

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R

Ramya 09/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

Define non - homogeneous linear equation?

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N

Neha 09/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What is the general form of characteristic matrix of A?

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P

Poonam 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

Define vector?

J

Jagmohan replied | 19/11/2016

Vector is name given to combination of magnitude and direction.

Sarvajeet replied | 03/12/2016

Any quantity which has both magnitude and direction is called the vector quantity.

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T

Thiago 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

Define position vector?

Jijo replied | 23/11/2016

Direction of a point from the origin of a system, that is a vector from origin to that point.

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M

Meenakshi 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What do you mean by direction cosines?

Sarvajeet replied | 03/12/2016

X = ai + bj + ck;
l=cos A=a/square root (square of a+square of b +square of c);
m=cos B=b/square root (square of a+square of b +square of c);
n=cos C=c/square root (square of a+square of b +square of c)
l, m, n are called direction cosines of the vector X.

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S

Sagar 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What do you mean by addition vectors?

Sarvajeet replied | 03/12/2016

In two given vectors, vector a and vector b.
So the addition of vectors, vector c= vector a + vector b.

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R

Raj 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What is the general equation for addition of vectors?

Sarvajeet replied | 03/12/2016

In two given vectors, vector a and vector b.
So, the addition of vectors, vector c= vector a + vector b.

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S

Shreya 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What is the general representation for unit vector?

Sarvajeet replied | 03/12/2016

Unit vector b (say vector b= ai + bj + ck)=(ai + bj + ck)/square root (square a + square b + square c).

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S

Shagufta 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

How we can know that three vectors a, b, c are collinear?

Sarvajeet replied | 03/12/2016

[vector a vector b cross vector c)]= (vector a) dot product.((vector b) cross product (vector c))= 0.

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M

Mukul 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

Find the values of x, y, and z so that the vectors: vector a = x(i) + 2(j) + z(k) and vector b = 2(i) + y(j) + k are equal?

Sarvajeet replied | 03/12/2016

2, 2, 1.

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P

Pavan 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

Let vector a = i + 2j and b = 2i + j. Is mod of vector a = mod of vector b?

Sarvajeet replied | 03/12/2016

mod of vector a = mod of vector b,
square root (1+4)=square root (4+1),
square root (5)=square root (5).

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H

Hemlata 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

Find the unit vector in the direction of the sum of the vectors, a = 2i + 2j +5k and b = 2i + j + 3k?

Hussam Uddin replied | 01/12/2016

4i + 3j + 8k / (sq root 89).

Sarvajeet replied | 03/12/2016

The unit vector=4i + 3j + 8k / (square root 89).

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A

Aamir 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What is the formula for section if it is internally divided in the ratio m:n?

Rachna replied | 19/11/2016

MX+NY/m+n

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K

Kavitha 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

If angle is zero then what is the product of two vectors a and b?

Hussam Uddin replied | 01/12/2016

Dot product is mod a * mod b. Vector product is zero.

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S

Sribaghya 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What are the important properties of scalar product?

Sarvajeet replied | 03/12/2016

For two vectors A(a1, a2, a3) and B(b1, b2, b3)
The scalar product=A.B=a1.b1+ a2.b2+ a3.b3.

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R

Rajmohan 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What are the type of vectors?

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S

Saravanan 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

Define all the type of vectors?

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P

Poonam 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What do you mean by modulus of a vector?

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U

User 08/11/2016 in  Mathematics(Class XI-XII Tuition (PUC)),

What is meant by unit vector?

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