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If f(x) =cos[pi^(2)]x + cos[-pi^(2)]x wh...

If `f(x) =cos[pi^(2)]x + cos[-pi^(2)]x` where [x] is symmetrical about the line x=3, then

A

`f(3+x) =f(3-x)`

B

`f(x)=-f(-x)`

C

`f(x+3)=f(x-3)`

D

`f(x)=f(-x)`

Text Solution

Verified by Experts

The correct Answer is:
C
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