The inverse cosine function has domain [-1,1]and range [0, pi]. Prove that (cos^-1)'(x) = -1/ sqrt(1-x^2).
This needs to be proved from a real analysis point of view not a calculus.© BrainMass Inc. brainmass.com March 4, 2021, 5:45 pm ad1c9bdddf
Let y = cos^-1(x)
<br>So now we need to prove that dy/dx = -1/sqrt(1-x^2)
<br>Let x = cos(t)------eqn 1
<br>Therefor y = cos^-1(cos(t))
<br> or y = t (because cos^-1 of cos means just ...
The inverse cosine functions of domain are analyzed. The expert proves from a real analysis point of view not a calculus.