f(-x)=|sin(-x)|+cos(-x)=|sinx|+cosx=f(x)
所以f(x)是偶函数
猜你喜欢
- 1in the usa, she made a lot of friends __ english well to make herself understood
- 2已知圆锥体的底面积是31.4平方厘米,高是6厘米,它的体积是_,与它等底等高的圆柱体的体积是_.
- 3在三角形ABC中,∠A,∠B,∠C所对的边分别为a,b,c,如果c=3a,∠B=30°,那么∠C=_.
- 4You need to know what the main idea of this passage is.语法对吗
- 5当k为何值时,分式方程(2/x-2)+(kx/x²-4)=(3/x+2)无解
- 6函数y=5*sin(2*x+a)的图象关于y轴对称的充要条件是什么
- 7求——动宾词组,20个.
- 8And she usually __36__ her son Henry with her.
- 9What do you wear in spring?I wear shirts.可以这样说吗
- 10九年级第一学期数学上海教育出版社39页第二题题目是什么