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(1)求ω的值,并畫出函數(shù)y=f(x)在區(qū)間［0,π］上的圖象;

(2)函數(shù)y=f(x)的圖象可由函數(shù)y=sinx的圖象經(jīng)過怎樣的變換得到?

設(shè)函數(shù)f(x)=sin(ωx+φ)(ω＞0,-＜φ＜),給出以下四個論斷:

①它的圖象關(guān)于直線x=對稱;

②它的圖象關(guān)于點(,0)對稱;

③它的周期是π;

④在區(qū)間［-,0)上是增函數(shù).

以其中兩個論斷作為條件,余下論斷作為結(jié)論,寫出你認(rèn)為正確的兩個命題:

(1)____________________________________________________________________________;

(2)____________________________________________________________________________.

A.1        B.1,-            C.-             D.1,

A.4sin(B+)+3                  B.4sin(B+)+3

C.6sin(B+)+3                        D.6sin(B+)+3

A.-或-            B.-               C.-            D.或

A.                 B.                C.                 D.