Question

se π/2<x<π e sendo x = 2/3, entao o valor do tg x é ​

Answer 1

cosx= √1-sen²x = √1-(4/9)= √5/9= -√5 /3

tgx = senx / cosx

tgx = 2/3 / -√5/3

tgx = -2/√5 = -2√5 /5 ✓