f(x)=6sin(x-π)cos(x 2π)-8sin平方x 5最小值为

f(x)=(√3/2)sin2x+(1/2)cos2x+(√3/2)sin2x-(1/2)cos2x+cos2x+1=√3sin2x+cos2x+1=2sin(2x+π/6)+1周期T=2π/2=π对

#include#include/*要使用正余弦函数必须包含math.h头文件*/#definePI3.14doubleF(x){returnsin(PI*x)+log(x);/*sin和log函数内

再问：谢啦w

(1)f(x)＝sin(2x＋π/6)＋sin(2x－π/6)＋2cos²x＝sin2xcosπ/6＋cos2xsinπ/6＋sin2xcosπ/6－cos2xsinπ/6＋2cos&sup

1.f(x)=sin(2x+6/π)+2sin^2x=(√3/2)sin2x+(1/2)cos2x+1-cos2x=(√3/2)sin2x-(1/2)cos2x+1=sin(2x-π/6）+1所以f(

多一个sin(2x+π/6)吧!f(x)=sin(2x+π/6)+2cos²x=sin2xcosπ/6+cos2xsinπ/6+1+cos2x=√3/2sin2x+3/2cos2x+1=√3

（1）F(X)=SIN(X+π/6)+2SIN^2(x/2)=SIN(X+π/6)+1-COSX=SIN(X+π/6)+1-SIN(π/2-X)=2COS[(X+π/6+π/2-X)/2]*SIN[(

f(x)={ln[sin(3x+1)]+C}'=1/sin(3x+1)*cos(3x+1)*3=3cot(3x+1)

π2x+π/6属于[π/2+2kπ,3π/2+2kπ]时为减区间,所以x属于[π/6+kπ,2π/3+kπ],k属于Z列表：三行2x+π/60π/2π3π/22πx(根据上面一行的值求出x对应的值)f

f(x)=(√3/2sinx/2+1/2cosx/2)(√3/2cosx/2+1/2sinx/2)=1/4(3sinx/2cosx/2+√3sin^2x/2+√3cos^2x/2+cosx/2sinx

因为f(x)=根号3sin(2x-π/6)+2sin的平方（x-π/12)=根号3sin(2x-π/6)-（1-2sin的平方（x-π/12)）+1=根号3sin(2x-π/6)-cos(2x-π/6

cos2x+cos(x+π/3)+sin(x+π/6)+3sin^2x=cos2x+1/2*cosx-根号3/2*sina+根号3/2*sinx+1/2*cosx+3sin^2x=cos2x+cosx

（根号2＋根号6）÷4再问：如何做的？？？？？？？？？？谢谢

f(x)=sin(2x-π/6)=cos[π/2-(2x-π/6)]=cos(2π/3-2x)=cos(2x-2π/3),故f(x)为偶函数,且其关于x=π/3对称,周期为π,因此a的最小整数为π.

f(x)=2cos(x-π/6)sin(x+π/6)-√3*(sin(x-π/6))^2+sin(x-π/6)cos(x-π/6）=sin2x+sin(π/3)-(√3/2）[1-cos(2x-π/3

f(25π/6)=f(π/6）3sin²x+sinxcosx=3sin²x+0.5sin2xf（x)=--根号下3sin²x+0.5sin2x然后根据函数的单调性就可求出

解题思路：计算解题过程：最终答案：略

(1)已知函数f(x)=-(√3)sin²x+sinxcosx,求f(25π/6).f(x)=-(√3)sin²x+sinxcosx=(√3/2)(cos2x-1)+(1/2)si

(5π/3,0).f(x)=2sin(x+π/6)-2cosx化简为f(x)=2sin(x-π/6),画个图,一目了然了.

f(x)=√3sinωx+cosωx=2(sinωx*√3/2+cosωx*1/2)=2(sinωx*cosπ/6+cosωx*sinπ/6)=2sin(ωx+π/6)