If `Cos theta= x/2 `, then find `Sin(theta/(2)) ` =?

If 2sin theta=2-cos theta find sin theta

If sin^(4) theta+cos^(4)theta=(1)/(2) , then find sin theta cos theta .

If 3cos theta=5sin theta, then find the value of 5sin theta-2sec^(3)theta+2cos theta5sin theta+2sec^(3)theta-2cos theta

If x=a cos theta + b sin theta and y=a sin theta - b cos theta. then a ^(2) +b^(2) is equal to

Find (dy)/(dx) if x=cos theta - cos 2 theta and" "y = sin theta - sin 2theta

If x=2 cos theta- cos 2 theta and y=2 sin theta - sin 2 theta, then (dy)/(dx) =

Find (dy)/(dx) if x= 3 cos theta - cos 2theta and y= sin theta - sin 2theta.

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

Find (dy)/(dx) , " if x " = 2 cos theta - cos 2 theta and y = 2sin theta - sin 2 theta .