Commerce (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Mathematics

Given that A = [a_ij] is a square matrix of order 3 × 3 and |A| = −7, then the value of `sum_("i" = 1)^3 "a"_("i"2)"A"_("i"2)`, where A_ij denotes the cofactor of element a_ij is:

If matrices A and B are inverse of each other then ____________.

If A `= [(5, "x"),("y", 0)]` and A = A' then ____________.

If the radius of a sphere is measured as 9 cm with an error of 0.03 cm, then find the approximating error in calculating its volume.

Find the approximate value of f(3.02), where f(x) = 3x² + 5x + 3

Find the general solution of the following differential equation:

`x (dy)/(dx) = y - xsin(y/x)`

The general solution of the differential equation y dx – x dy = 0 is ______.

Solve the differential equation: y dx + (x – y²)dy = 0

Evaluate: `int_0^(pi/4) (dx)/(1 + tanx)`

Find: `int e^x.sin2xdx`

Find: `int (2x)/((x^2 + 1)(x^2 + 2)) dx`

Find the general solution of the differential equation: `e^((dy)/(dx)) = x^2`.

Find `int e^(cot^-1x) ((1 - x + x^2)/(1 + x^2))dx`.

Find `int (sin^-1x)/(1 - x^2)^(3//2) dx`.

Find `int e^x ((1 - sinx)/(1 - cosx))dx`.

The derivative of x^2x w.r.t. x is ______.

Two vectors `veca = a_1 hati + a_2 hatj + a_3 hatk` and `vecb = b_1 hati + b_2 hatj + b_3 hatk` are collinear if ______.

Find: `int e^(x^2) (x^5 + 2x^3)dx`.

If `veca = 4hati + 6hatj` and `vecb = 3hatj + 4hatk`, then the vector form of the component of `veca` along `vecb` is ______.

The general solution of the differential equation ydx – xdy = 0; (Given x, y > 0), is of the form

(Where 'c' is an arbitrary positive constant of integration)