题目内容

若f(sinx)＝2－cos2x,则f(cosx)＝ (    )

A.2－sin2x                                                  

B.2＋sin2x

C.2－cos2x                                                 

D.2＋cos2x

D

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(文科)若f(sinx)＝2－cos2，则f(cosx)＝________

[　　]

A．2－sin2x

B．2＋sin2x

C．2－cos2x

D．2＋cos2x

若f(sinx)＝2－cos2x，则f(cosx)＝

[　　]

A．2－sin2x

B．2＋sin2x

C．2－cos2x

D．2＋cos2x

函数f(x)＝x＋sinx＋1(x∈R)，若f(a)＝2，则f(－a)的值为________．
若f(sinx)＝2－cos2x,则f(cosx)＝……………………………(    )

A.2－sin2x                              

B.2+sin2x

C.2－cos2x                              

D.2+cos2x

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