根号下一减cosx加根号下一加cosx化简根式
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![根号下一减cosx加根号下一加cosx化简根式](/uploads/image/f/5531501-29-1.jpg?t=%E6%A0%B9%E5%8F%B7%E4%B8%8B%E4%B8%80%E5%87%8Fcosx%E5%8A%A0%E6%A0%B9%E5%8F%B7%E4%B8%8B%E4%B8%80%E5%8A%A0cosx%E5%8C%96%E7%AE%80%E6%A0%B9%E5%BC%8F)
等于3+2√3
y=2^cosx+sin√x,复合函数求导数y'=(2^cosx)ln2(﹣sinx)+cos√x*1/(2√x)dy={(2^cosx)ln2(﹣sinx)+cos√x*1/(2√x)}dx
√12+√3+√27=2√3+√3+3√3=6√3
=√2-3√2+2√2=0
1、(1/2)cosx-根3*sinx/2=sin30cosx-cos30sinx=sin(30-x)2、3√15sinx+3√5cosx=9√2(sinx*√5/√6+cosx*1/√6)=9√2s
原式=2√2(cosx*1/2-sinx*√3/2)=2√2(cosxcosπ/3-sinxsinπ/3)=2√2cos(x+π/3)
根号里的数一样可以相加,如根号2+根号2=2倍根号2而根号里的数不一样,就不能相加,如根号2加根号3就等于根号2加根号3
=2*(根号3sinx/2+cosx/2)=2(sinx*cos30°+cosxsin30°)=2sin(x+30°)
y=cosx/根号下1-sin^2x加根号下1-cos^2x/sinx减tanx/根号下tan^2x=cosx/|cosx|+|sinx|/sinx-tanx/|tanx|因此,当x在第一象限时,y=
√3sinx-cosx=2(sinxcosπ/6-cosxsinπ/6)=2sin(x-π/6)
根号2加根号8加根号6=根号2+2根号2+根号6=3根号2+根号6无量寿佛,佛说苦海无涯回头是岸!施主,我看你骨骼清奇,器宇轩昂,且有慧根,乃是万中无一的武林奇才.潜心修习,将来必成大器,吾手中正好有
10(根号2/10cosx-根号6/10sinx)=10sin(α+x)其中sinα=根号2/10cosα=根号6/10
(1)a*b=0sin2x-cos2x=0sqr(2)sin(2x-π/4)=0x=π/8+kπ/2,k∈Z(2)f(x)=sqr(2)sin(2x-π/4)x∈(3π/8+kπ,7π/8+kπ),k
√2+√8+√18=√2+2√2+3√2=6√2
原式=2(sinx*√2/2-cosx*√2/2)=2(sinxcosπ/4-cosxsinπ/4)=2sin(x-π/4)
2cosx+1>0,andsinx>=0当2cosx+1>0,得到-2π/3+2kπ
原式=sinx/√(1+(2cos²(x/2)-1)=2sin(x/2)cos(x/2)/√2|cos(x/2)|x趋于π加,x/2趋于π/2加,cos(x/2)在第二象限为负值所以,原值=
√(1-cosX)=√[(1-cosX)/1]【根号内分子分母同乘以(1+cosx)】:=√[(1-cosX)(1+cosx)/(1+cosx)]=√[(1-cos^2x)/(1+cosx)]=√[s
2√2sin(π/6-x)