Commerce (English Medium) Class 12 - CBSE Question Bank Solutions

Integrate the functions:

`sqrt(sin 2x) cos 2x`

Integrate the functions:

`cos x /(sqrt(1+sinx))`

Integrate the functions:

cot x log sin x

Integrate the functions:

`sin x/(1+ cos x)`

Integrate the functions:

`(sin x)/(1+ cos x)^2`

Integrate the functions:

`1/(1 + cot x)`

Integrate the functions:

`1/(1 - tan x)`

Integrate the functions:

`sqrt(tanx)/(sinxcos x)`

Integrate the functions:

`(1+ log x)^2/x`

Integrate the functions:

`((x+1)(x + logx)^2)/x`

Integrate the functions:

`(x^3 sin(tan^(-1) x^4))/(1 + x^8)`

`(10x^9 + 10^x log_e 10)/(x^10 + 10^x)  dx` equals:

`int (dx)/(sin^2 x cos^2 x)` equals:

Maximise Z = x + 2y subject to the constraints

`x + 2y >= 100`

`2x - y <= 0`

`2x + y <= 200`

Solve the above LPP graphically

Show that the surface area of a closed cuboid with square base and given volume is minimum, when it is a cube.

Solve the following linear programming problem graphically :

Maximise Z = 7x + 10y subject to the constraints

4x + 6y ≤ 240

6x + 3y ≤ 240

x ≥ 10

x ≥ 0, y ≥ 0

Solve the following L.P.P. graphically: 

Minimise Z = 5x + 10y

Subject to x + 2y ≤ 120

Constraints x + y ≥ 60

x – 2y ≥ 0 and x, y ≥ 0

Find the vector and Cartesian equations of a line passing through (1, 2, –4) and perpendicular to the two lines `(x - 8)/3 = (y + 19)/(-16) = (z - 10)/7` and `(x - 15)/3 = (y - 29)/8 = (z - 5)/(-5)`

Solve the following L.P.P. graphically Maximise Z = 4x + y 

Subject to following constraints  x + y ≤ 50

3x + y ≤ 90,

x ≥ 10

x, y ≥ 0

A metal box with a square base and vertical sides is to contain 1024 cm³. The material for the top and bottom costs Rs 5 per cm2 and the material for the sides costs Rs 2.50 per cm2. Find the least cost of the box