题目内容

函数f(x)=2sin3x的图象按向量a平移后得到的图象与g(x)=2cos3x的图象重合,则向量a可以是

A. (-π/2,0)
B. (π/2,0)
C. (-π/6,0)
D. (π/6,0)

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某瓷器商人有280盒瓷杯需运往外地,与物流公司谈的是每盒瓷杯的运费是15元,如果损坏一盒。不仅无需支付运费还以得到物流100元/盒的补偿,最后一共支付给物流公司3395元。则在运输过程中损坏了多少盒瓷杯()

A. 7
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A. will
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