含有三角函数的复合函数值域问题,在各类试题中时常出现,这类问题经常涉及到代数中函数、方程与不等式等有关内容.下面就若干常见题型加以归纳总结如下,以供同行教学时参考.类型1　f(x)=asinx+bcosx(a、b不全为零).这是一类比较简单的函数.当x∈R时,ymax=a2+b2,ymin=-a2+b2.例1 The problem of compound function range containing trigonometric functions often appears in various questions. This type of problem often involves functions, equations, inequalities, etc. in algebra. The following is a summary of some of the common types of questions for peer teaching. Reference time. Type 1 f(x)=asinx+bcosx (a and b are not all zero). This is a relatively simple function. When x∈R, ymax=a2+b2,ymin=-a2+b2. example 1