Comments

• This does not seem to be an identity. It might be an equation in which you could solve for x; that is, find some x such that it is true If you want to try to prove it you could replace cos^2(x) -1 by -(1-cos^2(x) ) in other words - sin^2(x) Si…

  in verify cos(x)+1=cot^2(x)/(cos^2(x)-1)? Comment by clement-f May 2021
• This does not seem to be an identity. It might be an equation in which you could solve for x; that is, find some x such that it is true If you want to try to prove it you could replace cos^2(x) -1 by -(1-cos^2(x) ) in other words - sin^2(x) Si…

  in verify cos(x)+1=cot^2(x)/(cos^2(x)-1)? Comment by clement-f May 2021