If `(cos^(4)theta)/(x)+(sin^(4)theta)/(y)=(1)/(x+y), (theta " is constan t")` then `(dy)/(dx)=`

if x=cos theta,y=sin theta then (dy)/(dx)=

If x = sin theta, y = tan theta then find (dy)/(dx)

x=cos theta,y=sin theta then(dy)/(dx)

If x= e^(theta )(sin theta - cos theta ) , y= e^(theta ) ( sin theta + cos theta ) then (dy)/(dx) at theta =(pi)/(4) is

Find dy/dx "x=a cos^(4)theta;y=b sin^(4)theta

x=a sin2 theta(1+cos2 theta), y=b cos2 theta(1-cos2 theta) then (dy)/(dx)=

If x(cos theta)/(a)+y(sin theta)/(b)=1 and x(sin theta)/(a)-y(sin theta)/(b)=1 then

If (sin theta)/(x)=(cos theta)/(y) then sin theta-cos theta

If x = sin theta - cos theta and y = sin theta + cos theta , then (dy)/(dx) =

If x =a (cos theta +theta sin theta ), y =a (sin theta -theta costheta ) ,then (dy)/(dx) =