Question: If f ( x ) = c o s x , then f ' ( 2 ) = A . - 1 B . 2

If f(x)=cosx, then f'(2)=
A.-1
B.222
C.-322
D.12
E.1
If f ( x ) = c o s x , then f ' ( 2 ) = A . - 1 B

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