[" 4."(sin(theta+phi))/(cos(theta-phi))=(1-x)/(1+x)," 369CHAIB "G],[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-sin phi)^(2)+(cos theta-cos phi)^(2)=4sin^(2)(theta-phi)/(2)

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

If (a-b)sin (theta+phi)=(a+b)sin(theta-phi) and a tan. (theta)/(2)-b tan.(phi)/(2)=c , then

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

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.

If 0

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