Mathematics - Functions Question with Solution | TestHub

Sum or difference of two periodic functions is always a periodic function.

All solutions of equation of the form $f(\mathrm{x})=f^{-1}(\mathrm{x})$ always lies along the line $\mathrm{y}=\mathrm{x}$

All even degree polynomial functions defined on $R\to R$ will always be onto

All trigonometric functions within their respective domain are invertible