[(sin(theta+phi))/(cos(theta-phi))=,(1-x)/(1+x)" zCक "cos100 pi,],[,tan((pi)/(4)-theta)tan((pi)/(4)-phi)=x]

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 + varphi))/(cos ( theta - varphi))= (1-x)/(1+x), "show that" tan( pi/4 - theta)tan( pi/4 - varphi) = x

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

The value of cos((pi)/(4)-theta)cos((pi)/(4)-phi)-sin((pi)/(4)-theta)sin((pi)/(4)-phi) will be

Compute the following: {:[(sin(theta+phi), cos(theta+phi)),(sin(theta - phi),cos(theta-phi))] +[(sin(theta-phi), cos(theta-phi)),(sin(theta+phi), cos(theta+phi))]

If phi(x)=(1-x)/(1+x) , show that, phi(cos2 theta)=tan ^2theta.

prove that (cos3 theta+cos3 phi)/(2cos(theta+phi)-1)=(cos theta+cos phi)cos(theta+phi)-(sin theta+sin phi)sin(theta+phi)

(sin(theta+phi)-2sin theta+sin(theta-phi))/(cos(theta+phi)-2cos theta+cos(theta-phi))=tan theta

If 3tan theta tan phi=1 then (cos(theta-phi))/(cos(theta+phi)) is

If sin theta+sin phi=(1)/(4) and cos theta+cos phi=(1)/(5) then value of sin(theta+phi) is