y=sin(2x+a)(0
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y=sin(2x+a)(0
y=sin(2x+a)(0
y=sin(2x+a)(0
y=sinx是奇函数,y=cosx是偶函数
a=π/2
cosx
=sin(π/2-x) 提一个负号,得
=-sin(x-π/2) 再加半个周期π,得
=sin(x-π/2+π)
=sin(x+π/2)
y=sin(2x+a)(0
y=sin(2x+a)(0
函数Y=sin(2x+a),0
函数Y=sin(2x+a),0
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下列函数中最小值为2的函数是?)A.y=sin^2x+1/sin^2x(0
下列函数中,既为偶函数又在(0,π/2)内递增且是周期函数的是A y=sin x B y=cos x C y=sin|x| D y=|sin x|
若函数y=sin(x+a)(0
函数y=sin(2x+a) (-180度
是否存在a属于(0,π)使y=sinx+sin(x+a)为常值函数 使y=sinx+sin(x+a)+sin(x+2a)为常值函数
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