Find`(1+cos theta)^2`

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

sin theta+cos theta=1 Find (sin theta-cos theta)^(2)

Find 1/x+x=2cos theta, then prove that x^(n)+1/x^(n)=2cos n theta

If cot theta=(15)/(8), then Evaluate ((2+2sin theta)(1-sin theta))/((1+cos theta)(2-2cos theta))

Evaluate the simplified value of (1 + cot^2 theta) (1 - cos theta ) (1 + cos theta) .

Find all value of theta, between 0& pi, which satisfy the equation; cos theta*cos2 theta*cos3 theta=(1)/(4)

Find the number of solution of the equation 2(cos theta+cos2 theta)+sin2 theta(1+2cos theta)=2sin thetain theta in[0,3 pi]