Question

If x=30degree , verify that tan 2x = 2tan x / 1-tan^2x

Answer 1

Answer:

tan2x = 2tanx/1-tan^2x

tan2(30) = 2tan(30)/1-tan^(30)

tan60° = 2(0.5774)/1-(0.5774)^2

= 1.1548/1-0.33339

= 1.1548/0.66669

tan60° = 1.7321