Function hasActiveTrig

src/compute-engine/rubi/rubi-utils.ts:2261–2264

(e: Expression)

          ? jNum < kNum
          : !posQ(safeSimplify(ej.sub(ek)));
      const [qc, rc] = jIsQ
        ? [classes[j], classes[k]]
        : [classes[k], classes[j]];
      return { a: qc.coef, b: classes[i].coef, c: rc.coef, n: ei, q: qc.exp };
    }
    return null;
  }