If `x = a (sin theta - theta cos theta) and y = a (cos theta + theta sin theta)` find dy/dx at `theta` =` pi/4`

If x = a (cos theta + theta sin theta) and y = a (sin theta - theta cos theta) , find (d^2y)/(dx^2) at t = pi/4 .

If x = a(cos 2theta + 2theta sin 2theta) and y = a(sin 2theta - 2theta cos 2theta) ,find (d^2y/dx^2) at theta = π/8

If x = 2 cos theta - cos 2 theta, y = 2 sin theta - sin 2 theta, find dy/dx at theta = pi/2

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

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

x = a (theta - sin theta), y = a (1 + cos theta) find dy/dx

Find dy/dx when x = a (cos theta + theta sin theta) , y = a (sin theta - theta cos theta).

x = a (theta + sin theta), y = a (1 - cos theta) find dy/dx

If [x= a{theta - sin(theta)] and [y= a{1 - cos (theta)] find [d^2y/dx^2 at (theta = pi/2)

If A = [(cos theta, sin theta),(-sin theta, cos theta)] and B = [(sin theta, - cos theta), (cos theta, sin theta)] , evaluate A cos theta + B sin theta .