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在高中的数学中常常涉及到已知含参函数的单调性求参数的范围的有关问题,而此类问题在三角函数中也屡见不鲜.貌似很新颖很复杂的许多例题,实质是有关已知含参函数的单调性求参数的范围这类基本模型的化身,而解决这类问题无需高难度技巧,只需寻找周期T的取值范围或求单调区间再解不等式.此类问题在高考中经过多次演变成为一类内涵丰富、价值更高的经典问题,对变式的处理只需我们按部就班地就题论
In high school mathematics, it is often related to the problem of the range of monotonous parameters with known parametric functions, and such problems are not uncommon in trigonometric functions. Many of the examples that appear to be very novel and complex are essentially related to known The monotonicity of the parameters takes the range of the parameters as the incarnation of such basic models, and it is not necessary to solve the difficult problems of these kinds of problems, just look for the range of the value of the period T or find the monotone interval re-solution inequality. Has evolved many times into a class of classic problems with rich connotation and higher value. The treatment of the variant only requires us to proceed with the problem step by step