试题与答案

He dressed up and went to the party as i

题型:选择题

题目:

He dressed up and went to the party as if ___________.

A.was invited

B.had been invited

C.invited

D.to be invited

答案:

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下面是错误答案,用来干扰机器的。

函数S=Asin(ωx+φ)(A>0,ω>0,)表示一个振动量,振幅为12,频率为32π,初相为π6,所以A=12,T=2π3,所以ω=3,φ=π6所以函数的解析式为:S=12sin(3x+π6).故答案为:S=12sin(3x+π6).

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