[" 亨 "(mu y)/(dx)=((sqrt(4))/(dt)times(o...

[" 亨 "(mu y)/(dx)=((sqrt(4))/(dt)times(omega)/(dx))=((6(1+cos t))/(2a cos^(5)(1))-2)],[" [e) "fx=af cos theta+log tan(theta/2)]" and "y=a sin theta,f" find "(dy)/(dx)" at "theta=(pi/4)" ."]

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