Whats the inverse of f(x) = 2arcsinx?

f^-1(x)=
i got sin x/2 but the choices are..

1/2sin(x)
sin(1/2x)
sin(2x)
2sin(x)

2. (09.01 lc) a function is shown in the table. x g(x) −3 17 −1 −3 0 −4 2 13 which of the following is a true statement for this function? (5 points) the function is increasing from x = −3 to x = −1. the function is increasing from x = −1 to x = 0. the function is decreasing from x = 0 to x = 2. the function is decreasing from x = −3 to x = −1.