... , cos20 0 , sin30 0 , cos40 0 , sin60 0 , cos70 0 , sin90 0 là: A) sin10 0 , cos20 0 , sin30 0 , cos40 0 , sin60 0 , cos70 0 , sin90 0 . B) sin10 0 , cos70 0 , sin30 0 , cos40 0 , sin60 0 , cos20 ... sin60 0 , cos20 0 , sin90 0 . C) sin10 0 , cos70 0 , sin30 0 , cos20 0 , sin60 0 , cos40 0 , sin90 0 . D) sin10 0 , cos20 0 , sin60 0 , cos40 0 , sin30 0 , cos70 0 , sin90 0 . B. Ch ơng II : đờng...
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16/09/2013, 17:10