Daily Math · 2026-05-30

Question 1

The determinant of $A = \begin{pmatrix} 3 & 4 \ 1 & 2 \end{pmatrix}$ is:

Accepted Answer

$2$

Answer

$1$

Answer

$5$

Answer

$10$

Question 2

For the operation $x * y = x + y - 3$ on $\mathbb{R}$, the identity element is:

Accepted Answer

$3$

Answer

$0$

Answer

$1$

Answer

$-3$

Question 3

For every $x \in [-1, 1]$, the value of $\arcsin x + \arccos x$ is:

Accepted Answer

$\dfrac{\pi}{2}$

Answer

$0$

Answer

$\dfrac{\pi}{4}$

Answer

$\pi$