If [math]f(x) = \mathrm{cot}^{-1} (\tan(x)+\sin(x))[/math], what is the derivative of [math]f[/math]?
If [math]f(x+1) +f(x+3) =f(x) +f(x+2)[/math] What's [math]f?[/math]
אם [math]f(x) = \mathrm{cot}^{-1} (\tan(x)+\sin(x))[/math], מהי הנגזרת של [math]f[/math] ?
If [math]f(x+1) +f(x+3) =f(x) +f(x+2)[/math] מה זה [math]f?[/math]