Question

prove that tan−1 7−tan−1 5=tan−1 1/18​

Answer 1

Answer:

L..H.S= R.H.S (PROVED)

Step-by-step explanation:

L. H.S

$tan^{-1} 7 - tan^{-1} 5\\= tan^{-1} \frac{7-5}{1+ 7*5} \\= tan^{-1} \frac{2}{36}\\= tan^{-1} \frac{1}{18}$