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

Expert Teacher provides CBSE Maths 12 Science MCQ Vector Algebra Solutions through Video Solutions 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 Solution in a narrative video format.

** Question:**

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

** Solution Video in** **English****:**

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

**Question 1** : 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 2** : If a line has direction ratios 2, -1, -2, then what are its direction cosines? (View Answer Video)

**Question 3** : Find the area of the triangle with vertices A(1, 1, 2), B(2, 3, 5) and C(1, 5, 5). (View Answer Video)

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

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

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

**Question 5** : Find the magnitude of two vectors a and b having the same magnitude and such that the angle between them is and their scalar product is 1/2. (View Answer Video)

**Question 1** : The slope of the tangent to the curve:

at the point (2, -1) is: (View Answer Video)

**Question 2** : The rate of change of the area of a circle with respect to its radius r at r = 6 cm is : (View Answer Video)

**Question 3** : The approximate change in the volume of a cube of side x meters caused by increasing the side by 3% is _____________. (View Answer Video)

**Question 4** : Find two numbers whose sum is 24 and whose product is as large as possible. (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)

**Question 1** : If for any square matrix A, then write the value of |A|. (View Answer Video)

**Question 2** : Find the inverse of the matrix, . (View Answer Video)

**Question 3** : Compute: . (View Answer Video)

**Question 4** : Let Find A + B. (View Answer Video)

**Question 5** : Find the inverse of the matrix, . (View Answer Video)

**Question 1** : Using integration, find the area bounded by the tangent to the curve at the point (2, 1) and the lines whose equations are x = 2y and x = 3y - 3. (View Answer Video)

**Question 2** : Find the area enclosed by the parabola and the line x - y = 4. (View Answer Video)

**Question 3** : Find the area of the region enclosed by the parabola the line y = x + 2. (View Answer Video)

**Question 4** : Find the area of the region bounded by the curves and x = 3. (View Answer Video)

**Question 5** : Find the area enclosed between the parabola and the line y = mx. (View Answer Video)