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

Expert Teacher provides CBSE Three Dimensional Geometry Maths 12 Science 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 Three Dimensional Geometry 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:**

** If a line has direction ratios 2, -1, -2, then what are its direction cosines? **

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

**Question 1** : Write the sum of intercepts cut off by the plane on the three axes. (View Answer Video)

**Question 2** : If lines and intersect, then find the value of k and hence find the equation of plane containing these lines. (View Answer Video)

**Question 3** : Write the direction ratio's of the vector where and (View Answer Video)

**Question 4** : Find the distance between the point (7, 2, 4) and the plane determined by the points A(2, 5, -3), B(-2, -3, 5) and C(5, 3, -3). (View Answer Video)

**Question 5** : What is the distance of the point (p, q, r) from the x-axis ? (View Answer Video)

**Question 1** : Find the scalar quantities from the following:

(i) Time period (ii) Distance (iii) Force

(iv) Velocity (v) Work done (View Answer Video)

**Question 2** : If and denote the position vectors of points A and B respectively and C is a point on AB such that AC = 2 CB, then write the position vector of C. (View Answer Video)

**Question 3** : Find the vector quantities from the following:

(i) Time period (ii) Distance (iii) Force

(iv) Velocity (v) Work done

(View Answer Video)

**Question 4** : Write a vector in the direction of the vector that has magnitude 9 units. (View Answer Video)

**Question 5** : The two vectors and represent the two sides AB and AC, respectively of Find the length of the median

though A. (View Answer Video)

**Question 1** : Solve the differential equation (View Answer Video)

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

when x = 1, (View Answer Video)

**Question 3** : Solve the following differential equation :

(View Answer Video)

**Question 4** : Write the degree of the differential equation : (View Answer Video)

**Question 5** : Write the degree of the differential equation : (View Answer Video)

**Question 1** : Find the approximate value of f(5.001) where. (View Answer Video)

**Question 2** : The radius of an air bubble is increasing at the rate of . At what rate is the volume of the bubble increasing when its radius is 1 cm? (View Answer Video)

**Question 3** : If, then the approximate value of f(3.02) 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** : 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)