# Solving trigonometric equation in closed form [closed]

I am trying to solve $x/sin(x) = a$ for $x$, where $a$ is a constant. But I can't seem to find a closed form solution for it.

• Similar answer:math.stackexchange.com/questions/2317900/… Try numericaly: sol[a_] := NSolve[x/Sin[x] == a && -2 Pi < x < 2 Pi, x, Reals]; sol[2] – Mariusz Iwaniuk Jun 2 '18 at 7:20
• This does not seem to be a question specific to Mathematica. – Daniel Lichtblau Jun 2 '18 at 13:48
• Your equation is equivalent to the Kepler equation, which has no solutions in elemental functions – yarchik Jun 2 '18 at 14:40