y=sin(wx ∮)(w>0)|-搜答案-搜搜做题作业网

&=π/2,w=2.f(x)=sin(2x+π/2)=cos2x,偶函数,关于点M(3π/4,0)对称,且在[0,π/2]上是单调递减函数.

cos(π/2-wx）=sin（wx）所以f(x)=sin^2wx+根号3coswxsin（wx）所以=二分之（根号三加二）乘sin^2wx因为相邻两条对称轴之间的距离为π\2所以w=1）求W的值及f

f(x)=sin(wx+φ)+cos(wx+φ)=√2sin(wx+φ+π/4)T=2π/w=πw=2f(x)=√2sin(2x+φ+π/4)f(-x)=f(x),所以f(-π/8)=f(π/8)si

f(x)=√[(√3)²+1²]*sin(wx+q-z)=2sin(wx+q-z)tanz=1/√3所以z=π/6f(x)=2sin(wx+q-π/6)sin的对称轴是取最值的地方

解析：∵f(x)=sin(wx+fai)(w>0,-π≤faiT=5π/2==>w=4/5∴f(x)=sin(4/5x+fai)f(3π/4)=sin(3π/5+fai)=-1==>3π/5+fai=

首先f(-x)=f(x),得出是关于Y轴对称,f(0)要不是最大值,要不是最小值,排除B,D因为g的绝对值小于n/2,n就是PAI,所以单从SIN和COS上考虑,SIN移动一个正数（这个正数小于n/2

易得f(x)=sin(wx+q)+cos(wx+q)=√2sin(wx+q+π/4),最小正周期为pai得w=2,f(-x)=f(x)得q=π/4,所以=√2sin(2（x+π/4）),求导后f(x)

偶函数则x=0是对称轴sin的对称轴是在函数取最值得地方所以sin(0*w+q)=sinq=1或-10

首先得T/2=2π-3π/4=5π/4所以：T=5π/2,即2π/w=5π/2,所以：w=4/5；所以：y=sin(4x/5+A),把点(3π/4,-1)代入,得：-1=sin(-3π/5+A)所以：

.

y=cos^2(wx)-sin^2(wx)=cos(2wx),最小正周期为2π/2w=π,则w=1,则函数y=2sin(wx+π/4）=2sin(x+π/4）,单调区间为-π/2

因为T=2π/|w|所以w=2又因为sin（3π/2+2Kπ）=-1所以π+y=3π/2+2kπ所以y=π/2+2kπ因为,0

由图形知2π/w=(3-1)x4所以w=π/4y=sin(π/4x+α)当x-1y=1代入得α=π/4

函数f(x)=sin(wx+φ)(w>0,|φ|0,|φ|φ=2π/3f(x)=sin(2x-2π/3+φ)=-sin2x==>φ=-π/3∵|φ|x=kπ+5π/122x-π/3=2kπ-π/2==

f(x)=sin(wx+φ){w>0,|φ|0,|φ|φ=π/6∴f(x)=sin(2x+π/6)2x+π/6=2kπ==>x=kπ-π/12；2x+π/6=2kπ+π==>x=kπ+5π/12；点对

f(x)=√2sin(8（x/4+π/2)+φ）因为加了个π/2所以变成了cos所以变成偶函数

ecause:2sinx*cosx=sin2xso,y=1/2sin2wxT=4π,so,2w=2π/4π,so,w=1/4so,theanswerisAidontknowwhyicanttapeth

f(x)=sin(wx+φ)+cos(wx+φ)=√2sin（x+π/4+φ）而f（x）是偶函数,故f（x）关于x=0对称所以π/4+φ=kπ+π/2（k是整数）而,|φ|

周期为2π,w>0,则w=1f(x)=sin(wx+a)(w>0,0