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

Expert Teacher provides Vector Algebra MCQ CBSE Maths 12 Science Answers 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 |x|, if for a unit vector a,(x - a).(x + a) = 12. **

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

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

**Question 1** : P and Q are two points with position vectors and respectively. Write the position vector of a point R which divides the line segment PQ externally 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 the sum of the vectors and (View Answer Video)

**Question 4** : Find the scalar quantities :

(i) Work (ii) Force

(iii) Velocity (iv) Displacement. (View Answer Video)

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

**Question 1** : Evaluate : (View Answer Video)

**Question 2** : Write the value of: (View Answer Video)

**Question 3** : Evaluate: as limit of sums. (View Answer Video)

**Question 4** : Find : (View Answer Video)

**Question 5** : Evaluate : . (View Answer Video)

**Question 1** : The objective function is maximum or minimum, which lies on the boundary of the feasible region. (View Answer Video)

**Question 1** : What is the maximum value of the function sin x+ cos x? (View Answer Video)

**Question 2** : Find two positive numbers whose sum is 16 and the sum of whose cubes is minimum. (View Answer Video)

**Question 3** : A tank with a rectangular base and rectangular sides, open at the top is to be constructed so that its depth is 2m and volume is If the building of tank costs Rs.70 per sq meter for the base and Rs.45 per sq meter for sides. What is the cost of least expensive? (View Answer Video)

**Question 4** : The slope of the normal to the curve at x = 0 is: (View Answer Video)

**Question 5** : The normal to the curve passing (1,2) is____________. (View Answer Video)