Question

of A=30° then prove tan3A= 3tanA -tan³A/1-3tan³A​

Answer 1

Step-by-step explanation:

LHS= tan90 = infinite

RHS= 3* tan 30 - tan 3 30 /1-3 tan3 30

3*1/root3- 1/3root 3/1-3/3root 3

u solve u find infinite