已知函数y=2sinωx 6分之π-搜答案-搜搜考试网

单调增区间是:2kPai-Pai/2

（1）∵0≤x≤5，∴π3≤πx6+π3≤7π6，…（1分）∴−12≤sin(πx6+π3)≤1． …（2分）当πx6+π3＝π2，即x=1时，sin(πx6+π3)＝1，f（x

振幅为2；周期为π；初相为π/3单增区间：kπ－5π／12≦x≦kπ＋π／12对称轴：x=﹙1／2﹚kπ+（1／12）π

y=sinx的减区间应该是[π/2+2kπ,3π/2+2kπ](/是分数线的意思)所以y=2sin(2x+π/6）的减区间是2x+π/6∈[π/2+2kπ,3π/2+2kπ]即π/2+2kπ=

y=sinx的减区间应该是[π/2+2kπ,3π/2+2kπ](/是分数线的意思)所以y=2sin(2x+π/6）的减区间是2x+π/6∈[π/2+2kπ,3π/2+2kπ]即π/2+2kπ=

（0,1）代入原式知sinφ=1/2因为|φ|

函数f(x)=sinx的单增区间是【-π/2+2kπ,π/2+2kπ】所以,y=3sin（2x+π/3）的单增区间即,-π/2+2kπ

由化简sinx+cosx前分别乘以根号2*sin45.根号2*cos45.,得解根号2sinxy=sinx的平方+根好2*sinx+2令t=sinx-1=

y=sin²x+sinx+cosx+2=(1-cos2x)/2+√2sin(x+л/4)+2=(1/2)*sin(2x+л/2)+√2*sin(x+л/4)+5/2；=(1/2)*sin(2

我列个去,就算我高中毕业到现在已经8年了,我也看的出来1楼的乱说的撒,值域明显是[-2,2]嘛

即y=2sin(2x/3),y=sinx的单调递增区间为2kπ-π/2~2kπ+π/2,所以,2kπ-π/2

（1）∵0≤x≤5，∴π3≤πx6+π3≤7π6，…（1分）∴−12≤sin(πx6+π3)≤1． …（2分）当πx6+π3＝π2，即x=1时，sin(πx6+π3)＝1，f（x

画图吧

(-π/2,π/2)应小于等于半个周期,.-1≤ω≤1,又函数是减函数,sin(-ωπ/2)>sin(ωπ/2),sin(ωπ/2)

因为,-π/2

解答；f(x)=sin(2x+3分之π)∴sin(2x+π/3)=-3/5∵x∈(0,π/2)∴2x+π/3∈(π/3,4π/3)∵sin(2x+π/3)

因为Ymax=2直线Y=2说明T=πω=2π/T=2因为Y=2sin2x为奇函数,所以往左或右移T/2变成偶函数所以θ=±π/2因为（0

1:y=2sin(x+π/6）-2cosx=2[sinxcosπ/6+cosxsinπ/6]-2cosx=√3sinx+cosx-2cosx=√3sinx-cosx=2sin(x-π/6）2:y=2c

1、定义域是Rx系数是1所以T=2π/1=2π2、五点法即sin里取0,π/2,π,3π/2,π则x-π/3=0,x=π/3,sin(x-π/3)=0x-π/3=π/2,x=5π/6,sin(x-π/

y=sin(1/2x+π/3),x属于R当1/2x+π/3=2kπ+π/2时,y=sin(1/2x+π/3)有最大值1此时x=4kπ+π-2π/3=4kπ+π/3,k∈Z当1/2x+π/3∈【2kπ+