1.函數(shù)y=Asin(ωx+φ),A>0,ω>0中參數(shù)的物理意義
2.解三角函數(shù)應(yīng)用題的基本步驟:
(1)審清題意;
(2)搜集整理數(shù)據(jù),建立數(shù)學(xué)模型;
(3)討論變量關(guān)系,求解數(shù)學(xué)模型;
(4)檢驗(yàn),作出結(jié)論.
1.函數(shù)y=sin的周期、振幅、初相分別是( )
A.3π,, B.6π,,
C.3π,3,- D.6π,3,
B [y=sin的周期T==6π,振幅為,初相為.]
2.函數(shù)y=3sin的頻率為________,相位為________,初相為________.