Question 772222
I assume it means the inverse function.
If you know the value of R, you can calculate C as {{{C=6.28R}}}
If you know the value of C and need to find R, you "solve for R" in the equation above
{{{C=6.28R}}} --> {{{C/6.28=6.28R/6.28}}} --> {{{C/6.28=R}}} or {{{highlight(R=C/6.28)}}}