题目内容
已知函数
的部分图象如图所示,则( )
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A.![]() ![]() ![]() | B.![]() ![]() ![]() |
C.![]() ![]() ![]() | D.![]() ![]() ![]() |
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D
分析:通过图象求出函数的周期,再求出ω,由(
,1)确定φ,推出选项.
解答:解:由图象可知:T=π,∴ω=2;(
,1)在图象上,
所以 2×
+φ=
,φ=-
.
故选D.
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解答:解:由图象可知:T=π,∴ω=2;(
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所以 2×
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故选D.
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题目内容
A.![]() ![]() ![]() | B.![]() ![]() ![]() |
C.![]() ![]() ![]() | D.![]() ![]() ![]() |