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

Expert Teacher provides Vector Algebra Maths 12 Science CBSE 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:**

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

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

**Question 1** : Write the position vector of the point which divides the join of points with position vectors and in the ratio 2:1. (View Answer Video)

**Question 2** : Find the unit vector in the direction of vector PQ, where P and Q are the points (1, 2, 3) and (4, 5, 6) respectively. (View Answer Video)

**Question 3** : Find |x|, if for a unit vector a,(x - a).(x + a) = 12. (View Answer Video)

**Question 4** : Find the vector quantities from the following:

(i) 10 kg (ii) 2 m north-west (iii)

(iv) 40 W (v) (vi) (View Answer Video)

**Question 5** : Find a vector in the direction of that has magnitude 7 units. (View Answer Video)

**Question 1** : Find the area of the triangle with vertices at the points (2, 7), (1, 1), (10, 8). (View Answer Video)

**Question 2** : If find |A|. (View Answer Video)

**Question 3** : If , then x is equal to, (View Answer Video)

**Question 4** : A system of linear equations AX = B is said to be inconsistent, if the system of equations has, (View Answer Video)

**Question 5** : If A is an invertible matrix of order 2, then is equal to, (View Answer Video)

**Question 1** : Let Find AB. (View Answer Video)

**Question 2** : If , find (x-y). (View Answer Video)

**Question 3** : Let Find BA. (View Answer Video)

**Question 4** : Find the value of x, if . (View Answer Video)

**Question 5** : Find the value of z from the equation: . (View Answer Video)

**Question 1** : If the radius of a sphere is measured as 9 m with an error of 0.03 m, then find the approximate error in calculating its surface area. (View Answer Video)

**Question 2** : For the curve, y= if x increases at the rate of 2 units/sec, then how fast is the slope of curve changing when x=3? (View Answer Video)

**Question 3** : The slope of the tangent to the curve at the point (2, -1) is : (View Answer Video)

**Question 4** : For all values of x, the minimum value of is : (View Answer Video)

**Question 5** : The volume of a cube is increasing at the rate of 9 cubic centimetres per second. How fast is the surface area increasing when the length of an edge is 10 centimetres? (View Answer Video)