cos2x+sin2x,2=π/4 那么cosx+sinx等于多少
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cos2x+sin2x,2=π/4 那么cosx+sinx等于多少
![cos2x+sin2x,2=π/4 那么cosx+sinx等于多少](/uploads/image/z/16263247-31-7.jpg?t=cos2x%2Bsin2x%2C2%3D%CF%80%2F4+%E9%82%A3%E4%B9%88cosx%2Bsinx%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91)
2x=π/4
x=π/8
cosx+sinx
=cosπ/8+sinπ/8
x=π/8
cosx+sinx
=cosπ/8+sinπ/8
cos2x+sin2x=1 那么sinx-cosx等于多少
(sinx^2+sin2x)/(cosx^2=cos2x)等于多少
如果f(sinx)=cos2x,那么f(cosx)等于 A.-sin2x B.sin2x C.-cos2x D.cos2
若f(sinx)=cos2x,那么f(cosx)等于多少?
求证:(1-2sinx×cosx)/cos2x-sin2x=(cos2x-sin2x)/(1+2sinx×cosx)
sinx+cosx=1/5,x属于(π/2,3π/4),求sinxcosx,sin2x,cos2x,sinx,cosx
若3SinX=CosX,则Cos2X+Sin2X等于?
sinx×cos2x-sin2x×cosx
已知sinx=-1/2cosx,cosx-sinx/cosx+sinx+sin2x+cos2x的值
sinx+2cosx=0,则sin2x+cos2x=
Cosx+sinx分之1+sin2x+cos2x=2cos 证明
解方程 sin2x/sinx=cos2x/cosx