Function activateTrig

src/compute-engine/rubi/rubi-utils.ts:2425–2427

(ce: ComputeEngine, e: Expression)

/** Rubi AlgebraicFunctionQ — u is an algebraic function of x */
function algebraicFnQ(u: Expression, x: string, flag: boolean): boolean {
  if (!u.ops || !u.has(x)) return true;
  switch (u.operator) {
    case 'Power': {
      const e = u.ops[1];
      if (isLiteralRational(e.evaluate()) || (flag && !e.has(x)))