(1)方程sinx=x/10的根的个数为(）A.7B.8C.9D.10(2)函数y=根号sin(cos)的定义域为()A.[0,1]B.x属于RC.[kπ-π/2,kx+π/2](k属于Z)D.[2kπ-π/2,2kπ+π/2](k属于Z)(3)函数y=sinx-sin|x|的值域为()A.{0}B.[0,2]C[-2,2]D[-1,1]

Question

(1)方程sinx=x/10的根的个数为 ( ）
A.7 B.8 C.9 D.10
(2)函数y=根号sin(cos)的定义域为( )
A.[0,1] B.x属于R C.[kπ-π/2,kx+π/2](k属于Z) D.[2kπ-π/2,2kπ+π/2](k属于Z)
(3)函数y=sinx-sin|x|的值域为( )
A.{0} B.[0,2] C[-2,2] D[-1,1]

Answer 1

1）A
2）D
3）C