Question

tan [2 tan ^-1*1/5- tan ^-1 1]

Answer 1

Answer:

$tan(2 ({tan})^{ - 1} \frac{1}{5} - tan ^{ - 1} (1)) \\ \\ tan \: tan ^{ - 1} ( \frac{2}{5} - 1) \\ \\ \frac{2}{5} - 1 \\ \\ \frac{2 - 10}{5} \\ \\ \frac{ - 5}{5} \\ \\ - 1$