Question

. If tan (A+B) = m & tan (A –B) = n, show that tan 2A = m+n/1-mn

Answer 1

Answer:

Hence proved

Step-by-step explanation:

by using trigonometrical identiti

tan(a+b)= tana+tanb/1-tana×tanb

;tan[(A+B)+(A-B)]=tan(A+B)+tan(A-B)/1-tan(A+B)×tan(A-B)

by putting value of tan(A+B) And tan(A-B) we get tan2A=m+n/1-mn

Answer 2

Here is your answer

Hope it helps