Some improved ways to the trigonometric function solutions that Cao made are discussed and improved, and some conditions of solutions with parameters restricted are supplemented,gaining some valuable results.
对Cao给出的三角函数形式的解做了进一步的讨论,提出了一些改进方法,对方程的解中的参数应满足的条件做了进一步补充说明,得到了一些有意义的结果。
