[" 2.(ij) "sqrt(14)a cos phi=b cos theta" "33,06" Gizils "Q" ,"],[a tan theta+b tan phi=(a+b)tan(theta+phi)/(2)]

If " "a cos phi = b cos theta," show that " a tan theta + b tan phi = (a+b) tan ((theta + phi)/2)

If a cos phi=b cos theta, show that a tan theta+b tan phi=(a+b)tan((theta+phi)/(2))

If (1+tan theta)(1+tan phi)=2 then theta+phi=

If (1+tan theta)(1+tan phi)=2then(theta+phi) is

If (1 + tan theta) (1+ tan phi) = 2, then theta + phi =

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

If sin theta+sin phi=a and cos theta+cos phi=b find the value of tan((theta-phi)/(2))

If 3tan theta tan phi=1. Prove that 2cos(theta+phi)=cos(theta-phi)

If : sin (theta + phi) = 2 sin (theta - phi), "then" : tan theta = A) tan phi B) 2 tan phi C) 3 tan phi D) 4 tan phi

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