:cos(sinx) sin(cosx)分别求cos(sinx) sin(cosx)的周期 ,值域 ,单调性和奇偶性
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解不等式 cos(cosx)>sin(sinx)
sinx+cosx/sinx-cosx=2 求sinx/cos^3x +cosx/sin^3x
求cos(4sinx)、cos(3sinx)、sin(cosx)、sin(cos2x)、sin(cos3x)、sin(2cosx)值域
证明:cos(cos(cos(cosx)))>sin(sin(sin(sinx)))好的100分
证明(1+secx+tanx)/(1+secx-tanx)=(1+sinx)/cosx左边=(cosx/cosx+1/cosx+sinx/cosx)/(cosx/cosx+1/cosx-sinx/cosx)=(cosx+1+sinx)/(cosx+1-sinx)=(cosx+1+sinx)^2/[(cosx+1+sinx)(cosx+1-sinx)]=(cos²x+sin²x+2*sinx*cosx+2*cosx+2*sinx+1)/(cos²
3sinx-2cosx=0 (1)(cosx-sinx)/(cosx+sinx)+(cosx+sinx)/(cosx-sinx) (2)sin^2 x-2sinxcosx+4cos^2 x
化简sin(x+y)sinx+cos(x+y)cosx
化简sin(x+y)sinx+cos(x+y)cosx等于?
化简cos(x+y)sinx-sin(x+y)cosx
化简cos(x+y)sinx-sin(x+y)cosx
sinx*sin(x+y)+cosx*cos(x+y)等于?
证明x∈(0,π/2),cos(cosx)>sin(sinx)
cos(x+y)sinx-sin(x+y)cosx
方程sin(πcosx)=cos(πsinx)
sin(πcosx)=cos(πsinx)的解是
求化简(sinx+tanx)/cos^2x+sin^2x+cosx
解方程sin(πcosx)=cos(πsinx)
sin(πcosx)=cos(πsinx)解方程