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y=c1x-cos x+c2 y=x-cos x y=c1x+cos x+c2 y=x+cos x
(Ax+cos2x+(Cx+sin2x (Ax2+Bx)cos2x Acos2x+Bsin2x x(Ax+(cos2x+sin2x)
y=csin x y=ccos x y=sin x y=cos x
A、X=a*Sino;Y=b*Cose B、X=b*Cos(。/;Y=a*Sino C、x=a*Cose;Y=b*SinO D、X=b*Sino;Y=a*Cos(o/
y=csin x y=ccos x y=cos x y=cos x
y=c1x-cos x+c2 y=x-cos x y=c1x+cos x+c2 y=x+cox x
y=cos2x+2. y=cos2x+1. y=2cosx. y=2cos2x.
y=3cos(4πt-x/20) y=3COS4π(t+x/20) y=3COS 4π(t-x/20) y=3cos(4πt+x/20)
yp=2cos(4πt-x)m yp=2cos(4πt-π/2)m yp=2cos(4πct+π)m yp=2cos4xπtm
y=2cos(4πt-π/2)m y=2cos(4πct+π)m y=2cos(4πt-x)m y=2cos4xπtm
(Ax+B)cos2x+(Cx+D)sin2x (Ax+Bx)cos2x Acos2x+Bsin2x x(Ax+B)(cos2x+sin2x)
acosθ,asinθ,bθ acosθ,-sinθ,bθ asinθ,cosθ,bθ cosθ,sinθ,bθ
X=a*sin θ;Y=b*COSθ X=b*cos( θ/b),Y=a*sin θ X=a*COSθ;Y=b*sin θ X=b*sin θ;Y=a*cos θ
y=3cos(4πt-x/20) y=3COS4π(t+x/20) y=3COS 4π(t-x/20) y=3cos(4πt+x/20)
y=3cos(4πt-x/20) y=3COS4π(t+x/20) y=3COS4π(t-x/20) y=3cos(4πt+x/20)