Higher Math 2nd Paper MCQ-Chittagong Board-2017

1. Which of the following is rational number?

2. If the resultant of two concurrent forces is the largest, the angle between the forces is-

3. For the inverse circular function-

i. $\sin ^{-1} x+\cos ^{-1} x=\frac{\pi}{2}$

ii. $\tan ^{-1} x+\tan ^{-1} y=\tan ^{-1} \frac{x-y}{1+x y}$

iii. $3 \sin ^{-1} x=\sin ^{-1}\left(3 x-4 x^{3}\right)$

Which one is correct?

4. What is the value of $i^{4n+3}, n \in \mathbb{N}$

5. If $A$ and $B$ are two events such that $P(A$ $\cap B)=0$, then the events are-