f(x)=sin²x+根号3sinxcosx+2cos²x
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/09 02:42:53
1,f(x)=sin²x+√3sinxcosx+2cos²x=1-cos²x+√3/2sin2x+2cos²x=cos²x+√3/2sin2x+1=(
1f(x)=√3sinπx+cosπx=2((√3/2)sinπx+(1/2)cosπx)=2sin(πx+π/3)∴最小正周期T=2π/w=2π/π=2值域f(x)∈[-2,2]2-π/2+2kπ<
f(x)=2cosxsin(x+60°)-√3sin²x+sinxcosx=2cosx(sinxcos60º+cosxsin60º)-√3sin²x+sinxc
f(x)=5cos²x+sin²x-4√3sinxcosx=4cos²x+cos²x+sin²x-2√3sin2x=2(cos2x+1)+1-2√3s
由题意可得:f(x)=sin(2x+π/3)-√3sin^2x+sinxcosx+√3/2=sin(2x+π/3)-√3(1/2-1/2cos2x)+1/2sin2x+√3/2=2sin(2x+π/3
f(x)=2sinxcosx+2√3sin²x-√3=2sinxcosx+√3sin²x+√3(sin²x-1)=2sinxcosx+√3sin²x-√3cos
f(x)=根号3×sin(x/4)cos(x/4)+(cosx/4)^2=根号3/2*sinx/2+(cosx/2+1)/2=sinx/2cosPai/6+sinPai/6cosx/2+1/2=sin
y=sinx^2+根3sinxcosx+2cosx^2=-1/2(1-2sinx^2)+1/2根3*2sinxcosx+2cosx^2-1+3/2=-1/2cos2x+二分之根3倍sin2x+cos2
f(x)=2根号3sin方x+sin2x+根号3=根号3(2sin方x+1)+sin2x=根号3(1-cos2x+1)+sin2x=2根号3-根号3cos2x+sin2x=2sin(2x-60度)+2
f(x)=2√3sin²x-sin(2x-π/3)=√3-√3cos2x-1/2sin2x+√3/2cos2x=√3-(1/2sin2x+√3/2cos2x)=√3-sin(2x+π/3)T
f(x)=sin2(x+π)+根号3sin(x+π)sin(π-x)-1\2=sin2x-根号3sin²x-1/2=sin2x+根号3/2cos2x-1=根号7/2sin(2x+γ)-1co
∫sin(√x)dx=2∫√xsin(√x)d(√x)=2(-√xcos(√x)+∫cos(√x)d(√x))(应用分部积分法)=2(-√xcos(√x)+sin(√x))+C(C是任意常数)
f(x)=sin^2x+2√3sinxcosx+sin(x+π/4)sin(x-π/4)=(1-cos2x)/2+√3sin2x+(1/2)2sin(x-π/4)cos(x-π/4)=2-2cos2x
函数f(x)=负根号3sin^2x+sinxcosx应该没^这个符号的吧?如果是没有的话f(x)=负根号3sin2x+sinxcosx=负根号3sin2x+sin2x=(1/2-3^(1/2))sin
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
(1)化解函数:√3∵f(x)=sin²wx+√3sinwxcoswx+2cos²wx=√3/2sin2wx+sin²wx+cos²wx+cos²wx
(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
f(x)=[2sin(x+π/3)+sinx]cosx-√3sin²x=[sinx+√3cosx+sinx]cosx-√3sin²x=2sinxcosx+√3cos²x-
最大值2,最小值-2.通过化简,化成一个三角函数式,即可知道结果.请参考图片.