关于三角方程asinx＋bcosx＋c=0（a，b不同时为零，下同）解的情况．高中代数上册297页作了初步讨论．进一步的研究会发现，它在三角中的地位，类似于一元二次方程在代数中的地位，其解的判别条件应用广泛，在解决有关问题时，思路简捷，方法生动有趣，多年来的高考题目也... About the case of the trigonometric equation asinx+bcosx+c=0 (a,b is not zero at the same time). A preliminary discussion was made on the 297 pages of the Algebra Algebra book. Further research will find that its position in the triangle is similar to the position of the one-dimensional quadratic equation in algebra. The discriminant conditions of the solution are widely used. When solving related problems, the idea is simple and the method is vivid and interesting. Title also...