Question

Seja o ângulo agudo x tal que cosseno de x = 5/6, determine a tangente de x.

Answer 1

sen²x + cos²x=1
sen²x+ (5/6)²=1
sen²x= 1- 25/36
sen²x= 11/36
senx = √11/6

tangente= senx/cosx
TG = √11/6/5/6
TG = √11/6 . 6/5
TG = √11/ 5