12 Science Maths CBSE Vector Algebra Answers for MCQ in English to enable students to get Answers in a narrative video format for the specific question.

Expert Teacher provides 12 Science Maths CBSE Vector Algebra Answers for MCQ through Video Answers in English language. This video solution will be useful for students to understand how to write an answer in exam in order to score more marks. This teacher uses a narrative style for a question from Vector Algebra not only to explain the proper method of answering question, but deriving right answer too.

Please find the question below and view the Answer in a narrative video format.

** Question:**

** Find the vector quantities :
(i) Work (ii) Force
(iii) Velocity (iv) Displacement. **

** Answer Video in** **English****:**

You can select video Answers from other languages also. Please check Answers in ( Hindi )

**Question 1** : Find the scalar and vector components of the vector with initial point (2, 1) and terminal point (-5, 7).

**Question 2** : Find a vector in the direction of vector which has magnitude 21 units.

**Question 3** : Find a vector of magnitude making an angle of with x-axis, with y-axis and an acute angle with z-axis.

**Question 4** : if a, b, c are unit vectors such that a + b + c = 0, then find the value of a.b + b.c + c.a.

**Question 5** : Find the direction cosines of the vector joining the points A(1, 2, -3) and B(-1, -2, 1), directed from A to B.

**Question 1** : If m and n are the order and degree, respectively of the differential equation then write value of m+n.

**Question 2** : Find the solution of the differential equation

**Question 3** : Write the differential equation representing the curve where a is an arbitrary constant.

**Question 4** : Solve the differential equation

**Question 5** : Obtain the differential equation of all the circles of radius r.

**Question 1** : Let A = {1, 2, 3, 4} and let R = {(2, 2), (3, 3), (4, 4), (1, 2)} be a relation on A. Then, R is,

**Question 2** : Let * be the binary operation on N given by a * b = LCM of a and b. Find 20 * 16.

**Question 3** : If f(x) = ax + b and g(x) = cx + d, then f[g(x)] – g[f(x)] is equivalent to,

**Question 4** : Let * be the binary operation on N given by a * b = LCM of a and b. Find the identity of * in N?

**Question 5** : Let * be the binary operation on N given by a * b = LCM of a and b. Find 5 * 7.

**Question 1** : Given, , find the value of x.

**Question 2** : Compute: .

**Question 3** : Let Find A - B.

**Question 4** : Let Find 3A - C.

**Question 5** : Given, , find the value of z.