Question

please answer this question

Answer 1

option b is correct

given
x=acost
dx/dt = d/dt(acost) = -asint                  d/dx(sinx) = cosx n d/dx(cosx) = -sinx
y= bsint
dy/dt = d/dt(bsint) = bcost

dy/dx = (dy/dt)/(dx/dt)
         = -  bcost/asint
         = -b/a cott