函数f(x)=sin(x 5π 12)cos(x-π 12)
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用换元法,设X+3=t,则X=T-3,带入得f(T)=(T-3)5,所以f(x)=(x-3)5,所以导数就是5(X-3)4,你肯定懂啦!
1、由于函数g(x)=sin(2(x-a)+π/3)为偶函数,所以g(x)的图像关于y轴对称,即函数g(x)当x=0时取得最值,所以g(0)=±1,解得sin(π/3-2a)=±1,sin(2a-π/
f(-3)=(-3)^5+a(-3)^3+b*(-3)+2=1所以,-[3^5+a*3^3+3b]=-1所以,3^5+a*3^3+3b=1所以,f(3)=(3^5+a*3^3+3b)+2=1+2=3
∵f(x)=2sin(π-x)cosx=2sinxcosx=sin2x1、最小正周期T=2π/2=π.2、∵-π/6≤x≤π/2∴-π/3≤2x≤π,∴-√3/2≤f(x)≤1,∴最大值1,最小值-√
先用tanx=sinx/cosx、倍角公式、诱导公式化简原函数:f(x)=sin²x+sinxcosx-sin[2(x+π/4)]=(1-cos2x)/2+1/2sin2x-sin(2x+π
你啊,要好好学习了!还没有悬赏分?把对称轴即x=∏/8代入原式子,即sin(∏/4+φ)=1或者-1,再用(-π
f(x)=cosx+sinxf(x)=√2sin(x+π/4)(1)递增区间:2kπ-π/2≤x+π/4≤2kπ+π/2得:2kπ-3/4π≤x≤2kπ+π/4递增区间是:[2kπ-3π/4,2kπ+
f(x)=[2sin(x+π/3)+sinx]cosx-√3sin^2x=[sinx+√3cosx+sinx]cosx-√3sin^2x=2sinxcosx+√3cos^2x-√3sin^2x=sin
f(x)=sinx-sin(x-π3)=12sinx+32cosx=sin(x+π3)∴函数f(x)=sinx-sin(x-π3)的最大值为1故答案为:1
f(x)=sin(2x+π/3)+sin(2x-π/3)+2cos^2x-1=sin2xcosπ/3+cos2xsinπ/3+sin2xcosπ/3-cos2xsinπ/3+cos2x=2sin2xc
f(x)=sin(π-x)sin(π/2-x)+cos²xf(x)=sinxcosx+cos²x=1/2sin2x+1/2+1/2cos2x=1/2(sin2x+cos2x)+1/
f(x)=2sinx*sin(π/2+x)-2sin^2x+1=2sinxcosx+cos2x=sin2x+cos2x=√2sin(2x+π/4)因为f(x0/2)=根2/3所以sin(x0+π/4)
因为f(x)=sinx+cosx=√2sin(x+π/4)第一题T=2π/1=2π第二题当sin(x+π/4)=1时,为最大值,即f(x)=√2sin(x+π/4)=-1时,为最小值,即f(x)=-√
1)由三角函数和差化积公式:f(x)=2sin(x+x+π/3)/2cos(x-x-π/3)/2=2sin(x+π/6)cos(π/6)=√3sin(x+π/6)f(x)的最小值为-√3.当x+π/6
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
∵f(x)=|OM|=(cosπx3+cosπx5)2+(sinπx3+sinπx5)2=cos(2π15x)+2∵ω=2π15故T=2πω=15故选D
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
正弦函数周期为2π,函数所以f(x)=1-sinπx/2最小正周期为:T=2π/(π/2)=4所以只需计算前四项值:f(0)=1,f(1)=0,f(2)=1,f(3)=2而2010/4=502余2所以
f(x)=sin^2x+sinxcosx-sin^2x+cos^2x=sinxcosx+cos^2x=sin2x/2+(1+cos2x)/2=sin2x/2+cos2x/2+1/2(1)f(a)=si