List of top Mathematics Questions

The solution of \( D^2 + 16y = \cos 4x \) is:

Determine which one of the following relations on \( X = \{1, 2, 3, 4\} \) is not transitive.

The value of the integral \( \int_1^4 \sqrt{t} \, dt \) is:

What is the area of a loop of the curve \( r = a \sin 30^\circ \)?

The maximum value of \( \left| \frac{1}{x} \right| \) is:

What is the least value of \( k \) such that the function \( x^2 + kx + 1 \) is strictly increasing on \( (1, 2) \)?

If \( f(2) = 4 \) and \( f'(2) = 1 \), then \[ \lim_{x \to 2} \frac{x f(2) - 2f(x)}{x - 2} \text{ is equal to:} \]

If \( u = \tan^{-1} \left( \frac{x^3 + y^2}{x + y} \right) \), then \( \frac{\partial u}{\partial x} + \frac{\partial u}{\partial y} \) is:

The value of the integral \( \int_0^{\frac{\pi}{2}} \log (\tan x) \, dx \) is:

An equilateral triangle is inscribed in the parabola \( y^2 = 4ax \), one of whose vertices is at the vertex of the parabola, the length of each side of the triangle is:

If \( \sin \theta, \cos \theta, \tan \theta \) are in G.P., then \( \cos^2 \theta + \cos \theta + 3 \cos \theta - 1 \) is equal to:

In a triangle ABC, \( 5 \cos C + 6 \cos B = 4 \) and \( 6 \cos A + 4 \cos C = 5 \), then:

The region of the Argand plane defined by \( |z - 1| + |z + 1| \leq 4 \) is:

The value of the sum \( \sum_{n=1}^{13} (i^n + i^{n+1}) \), where \( i = \sqrt{-1} \), equals:

In a model, it is shown that an arc of a bridge is semielliptical with major axis horizontal. If the length of the base is 9m and the highest part of the bridge is 3m from horizontal, the best approximation of the height of the arch, 2m from the center of the base is:

The number of real tangents through \( (3, 5) \) that can be drawn to the ellipses \( 3x^2 + 5y^2 = 32 \) and \( 25x^2 + 9y^2 = 450 \) is:

If the normal to the rectangular hyperbola \( xy = c^2 \) at the point \( (ct, c/t) \) meets the curve again at \( (ct', c/t') \), then:

An equation of the plane passing through the line of intersection of the planes \( x + y + z = 6 \) and \( 2x + 3y + 4z = 5 \), and passing through \( (1, 1, 1) \) is:

If \( \alpha \) and \( \beta \) are the roots of the equation \( ax^2 + bx + c = 0 \), then the value of \( \alpha^3 + \beta^3 \) is:

If \( e^x = y + \sqrt{1 + y^2} \), then the value of y is:

Consider an infinite geometric series with the first term and common ratio. If its sum is 4 and the second term is \( \frac{3}{4} \), then:

The volume of the tetrahedron with vertices \( P(1, 2, 0), Q(2, 1, -3), R(1, 0, 1) \), and \( S(3, -2, 3) \) is:

The length of the shortest distance between the lines \( \mathbf{r} = 3i + 5j + 7k + \lambda(2i - 2j + 3k) \) and \( \mathbf{r} = -i - j + k + \mu(7i - 6j + k) \) is:

If \( \mathbf{a} = i + 2j + 3k \), \( \mathbf{b} = i + 2j + k \), and \( \mathbf{c} = 3i + j \), then \( \mathbf{a} + \mathbf{b} \) is at right angle to \( \mathbf{c} \), then \( a + b \) and \( t \) are equal to:

The value of \( x \), for which the matrix \( A \) is singular, is: \[ A = \begin{pmatrix} 2 & x & -1 & 2 \\ 1 & x & 2x^2 \\ 1 & \frac{1}{x} & 2 \end{pmatrix} \]