What is the slope of y=arcsin(x) when x=0.4?

(You can compute arcsin(x)=sin^-1(x) by pressing the “inverse” or “second function” key, then pressing the “sin” key. Do this calculation in degrees, so arcsin(1)=90.)


The formula for the slope is_______, for h close to 0(but not equal 0)

The best estimate for slope is______.