设函数f(x)可导,则 [sin f(x)]'= (A)sin f'(x) (B)cos f'(x) (C)f'(x)cos f(x) (D)f(x)cos f'(x)

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/04 08:10:03

设函数f(x)可导,则 [sin f(x)]'= (A)sin f'(x) (B)cos f'(x) (C)f'(x)cos f(x) (D)f(x)cos f'(x)

[sin f(x)]'=cosf(x)*[f(x)]'=f'(x)*cosf(x)
选C

(C)f'(x)cos f(x)