Question

Se tgx=1/4 . calcule o valor de th2x. Preciso de ajuda *---*

Answer 1

Oi Flávia

tg(x) = 1/4 

formula

tg(2x) = 2tg(x)/(1 - tg²(x)) 

tg(2x) = (2/4)/(1 - 1/16) = (1/2)/(15/16) = (1/2)*(16/15) = 8/15