> 
> Write each pair of equations as a single equation in $x$ and $y$.  
> 
>  a)$\begin{cases}
>  x=t+1 &\\
>  y=t^2-t & \\
>  \end{cases}$ 
>  b)$
>  \begin{cases}
>  x=\sqrt[3]{t}-1 &\\
>  y=t^2-t & \\
>  \end{cases}$ 
>  c)$\begin{cases}
>  x=\sin t &\\
>  y=\cos t & \\
>  \end{cases}$
> 
> 
> 

All I want to know is what the question is asking me to do. Please **do not** give me the answer to any of these, if needed please make up an example. After that, I will edit with my steps to see if I am doing this correctly.

**Edit:** Now, I know this has come up before, but can someone please tell me the difference between $\arcsin$ and $\sin^{-1}$. Or are they the same?