if `tan A =k tan B` show that `sin(A+B)=((k+1)/(k-1))sin (A-B)`

A+B=C and tan A=k tan B, then prove that sin(A-B)=(k-1)/(k+1)sin C

A+ B = C and tan A = k tan B , then prove that sin (A-B) = (k-1)/(k+1) sin C

If theta+phi= alpha and tan theta=k tan phi , prove that : sin alpha=(k+1)/(k-1) sin (theta-phi) .

If theta+phi=alpha and tan theta =k tan phi , prove that: sin alpha=(k+1)/(k-1)"sin"(theta-phi)

(tan A + tan B) / (tan A-tan B) = (sin (A + B)) / (sin (AB))

If tan (A+B) = 3 tan A , "show that" sin (2A +2B) + sin 2A = 2 sin 2 B

Prove that: If tan A=x tan B, prove that (sin(A-B))/(sin(A+B))=(x-1)/(x+1)

Sin A=m sin B,show that , tan((A-B)/2)=(m-1)/(m+1)tan((A+B)/2)

If an angle alpha is divided into two parts A&B such that A-B=x and tan A:tan B=k:1 Then the value of sin x is (A) (k+1)/(k-1)sin alpha (k)/(k+1)sin alpha (C) (k-1)/(k+1)sin alpha (D) tan alpha

"If" (tan 3 A)/(tan A) = k ", show that" ( sin 3 A)/(sin A) = (2k)/(k-1), also show that the value of k cannot lie between 1/3 "and" 3