The domain of ${\sin }^{-1}$ is

$\sum _{i=0}^2{\cot }^{-1}\{-(i+1\left)\right\}=$

Which of the following is a graph of $f\left(x\right)={\tan }^{-1}x,(x\in R)$?

The value of ${\sec }^{-1}x+{cosec}^{-1}x+{\cos }^{-1}\left(x^{-1}\right)+{\sin }^{-1}\left(x^{-1}\right)$ is (where $\left|x\right|\ge 1,x\in R$)

$\cot \left\{\frac{2019\pi }{2}-\left({cosec}^{-1}\left(\frac{5}{3}\right)+{\tan }^{-1}\left(\frac{2}{3}\right)\right)\right\}=$