Higher Math 2nd Paper MCQ-Rajshahi Board-2022

1. What is the value of $(\sqrt{-3}) \times(\sqrt{-1})=$ ?

2. If $\sec \theta=-2$ and $\frac{\pi}{2}<\theta<\pi$, then what is the value of $\theta$ ?

3. $z=3 i$

Which point is formed by $\bar{z}$ ?

4. $9 x^{2}-16 y^{2}=144$ is a equation of hyperbola.

Which one is the equation of directrix?

5. If $2+i$ is a root of $x^{2}+m x+n=0$, which one is the value of $m$ and $n$ ?