If ` x=costheta,y=log ( tan ((theta)/(2))),then (dy)/(dx) =`

y=3^(log_(9)(1+tan^(2)x)) then (dy)/(dx)=

1. If x = at ^(2) , y = 2 at then (dy)/(dx) at t =1 is A 2 If x =cos theta, y = sin theta then (dy)/(dx) at theta = (pi)/(4) is B 3 If x =1 - cos theta, y = sin theta , then (dy )/(dx) at theta = (pi)/(6) is C 4 If x = log sin theta, y = tan theta then (dy)/(dx) at theta = (pi)/(4) is D. The ascending order of A,B,C,D is

If y=log[tan(pi/4 +x/2)]) ,then (dy)/(dx) is

If y=log[tan(pi/4 +x/2)]) ,then (dy)/(dx) is

If x=a(costheta+log"tan"theta/2),y=asintheta,"find "dy/dx" at "theta=pi/3 .

If x = a{costheta + log tan((theta)/(2))} andy = a sin theta, then (dy)/(dx) is equal to

If x=a(cos theta+log tan((theta)/(2))) and y=a sin theta then find (dy)/(dx) at theta=(pi)/(3) and theta=(pi)/(4)

If y= log (secx+tan x ) ,then (dy)/(dx)

If x=a(cos theta+log(tan((theta)/(2))) and y=a sin theta then find the value of (d^(2)y)/(dx^(2)) at theta=(pi)/(4)

If x=a(theta-sintheta),y=a(1-costheta) then (dy)/(dx)=