" If "tan theta=(x sin phi)/(1-x cos phi)" and "tan phi=(y sin theta)/(1-y cos theta)," then prove that "(x)/(y)=(sin theta)/(sin phi)

If tan theta=(x sin phi)/(1-x cos phi) and tan phi=(y sin theta)/(1-y cos theta) then the value of (x)/(y) is

If tan theta = (xsin phi)/(1-xcos phi) and tan phi = (y sin theta)/(1-y cos theta) show that x sin phi = y sin theta

If sin theta+sin phi=sqrt(3)(cos phi-cos theta), prove that sin3 theta+sin3 phi=0

If sin theta+sin phi=sqrt(3)(cos phi-cos theta)), prove that sin3 theta+sin3 phi=0

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

If "sin" theta+"sin" phi=sqrt3(cos phi-cos theta) ,prove that: "sin" 3theta+"sin" 3phi=0 .

If sin theta+ sin phi= sqrt3 (cos phi-cos theta) , prove that : sin 3 theta+ sin 3 phi=0 .

If sin theta sin phi - cos theta cos phi+1 =0 then the value of 1+ cot theta tan phi is-

sin(theta+phi)/cos(theta-phi)=(1-x)/(1+x) then prove that tan(pi/4-theta)tan(pi/4+phi)=x

" If "|{:(sin theta cos phi,,sin theta sin phi,,cos theta),(cos theta cos phi,, cos theta sin phi,,-sin theta),(-sin theta sin phi,,sin theta cos phi,,theta):}| then