[" 23.If "y sin phi=x sin(2 theta+phi)" show that "],[(x+y)cot(theta+phi)=(y-x)cot theta]

If y sinphi = x sin (2theta + phi) show that (x + y) cot (theta + phi) = (y-x) cot theta .

If y sinphi = x sin (2theta + phi) show that (x + y) cot (theta + phi) = (y-x) cot theta .

If sin theta=k sin(theta+phi), show that tan(theta+phi)=(sin phi)/(cos phi-k)

If sin theta = k sin (theta + phi),"show that", tan(theta + phi) = (sin phi)/(cos phi -k).

If 2 tan theta = cot phi, "show that" cos(theta - phi) = 3 cos ( theta + phi).

(sin ( theta -phi))/(sin theta sin phi) = cot phi - cot theta.

If tan theta+tan phi=a and cot theta+cot phi=b then cot(theta+phi)=

Prove that cos 2 theta cos 2 phi + sin ^(2) ( theta - phi) -sin ^(2) (theta + phi) = cos ( 2 theta + 2 phi).

If sin theta=5sin(theta+phi) then tan(theta+phi)=

(sin (theta + phi))/( sin theta cos phi) = cot theta tan phi +1.