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

Expert Teacher provides CBSE 12 Science Answers for MCQ Maths Application of Derivatives 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 Application of Derivatives not only to explain the proper method of answering question, but deriving right answer too.

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** Question:**

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

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**Question 1** : Sand is pouring from a pipe at the rate of . The falling sand forms a cone on the ground in such a way that the height of the cone is always one-sixth of the radius of the base. How fast is the height of the sand cone increasing, when the height is 4 cm? (View Answer Video)

**Question 2** : The function f is a differentiable function and satisfies the functional equation f(x) + f(y) = f(x + y) – xy – 1for every pair x, y of real numbers. If f(1) = 1, then the number of integers n ≠ 1 for which f(n) = n 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 approximate value of. (View Answer Video)

**Question 5** : Find two positive numbers x and y such that x+y=60 and is maximum. (View Answer Video)

**Question 1** : Write a unit vector in the direction of the sum of vectors and (View Answer Video)

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

**Question 3** : Find the unit vector in the direction of if and (View Answer Video)

**Question 4** : Find a unit vector parallel to the sum of vectors and (View Answer Video)

**Question 5** : Find a vector in the direction of vector which has magnitude 21 units. (View Answer Video)

**Question 1** : Find for the function . (View Answer Video)

**Question 2** : Differentiate the function with respect to x. (View Answer Video)

**Question 3** : Differentiate the function w.r.t.x . (View Answer Video)

**Question 4** : Differentiate the function with respect to x. (View Answer Video)

**Question 5** : If x and y are connected parametrically by the equation , without eliminating the parameter, find . (View Answer Video)

**Question 1** : If , find (x-y). (View Answer Video)

**Question 2** : Compute: . (View Answer Video)

**Question 3** : If a matrix has 24 elements, what are the possible orders it can have? (View Answer Video)

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

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