Question

Se cos x = 4/5 com 0 < x <90° , então calcule:


a) sec x

b) sen x

c) tg x

Answer 1

Vamos la

cos(x) = 4/5 , sen²(x) = 25/25 - 16/25 = 9/25, sen(x) = 3/5

a) sec(x) = 1/cos(x) = 5/4

b) sen(x) = 3/5

c) tg(x) = sen(x)/cos(x) = 3/4