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Select and write the correct answer from the given alternatives in each of the following:If `f(x)=[[cosx,-sinx,0],[sinx,cosx,0],[0,0,1]]`then `f(x+y)`is equal to

A

`f(x)+f(y)`

B

`f(x)-f(y)`

C

`f(x).f(y)`

D

None of these

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