Add inverse for trigonometric functions (#7258)

- `math arcsin`
- `math arccos`
- `math arctan`

Again include `--degrees` or `-d` for convenient output in degrees

crates/nu-command/src/default_context.rs

@@ -411,6 +411,9 @@ pub fn create_default_context() -> EngineState {
             MathSinH,
             MathCosH,
             MathTanH,
+            MathArcSin,
+            MathArcCos,
+            MathArcTan,
             MathPi,
             MathEuler,
         };