函数y=sin(2x+φ)(0
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函数y=sin(2x+φ)(0函数y=sin(2x+φ)(0函数y=sin(2x+φ)(0函数y=sin(2x+φ)(0即函数是余弦函数所以φ=π/2y=sin(2x+φ)=cos(π/2-2x-φ)
函数y=sin(2x+φ)(0
函数y=sin(2x+φ)(0<=φ＜=π)是R上的偶函数,则φ的值是 求详解.
函数y=sin(2x+φ)(0
函数y=sin(2x+φ)(0<=φ＜=π)是R上的偶函数,
即函数是余弦函数
所以
φ=π/2
y=sin(2x+φ)=cos(π/2-2x-φ)=cos(2x+φ-π/2)
由图像，知y=cos2x为偶函数，即φ-π/2=kπ，φ=kπ+π/2。
0<=φ＜=π，故φ=π/2。
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函数y=sin(2x+φ)(0
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函数y=sin(2x+φ)(0
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