Question

Sabendo que sen x = 3/5 e cos x = - 4/5 , calcule cossec x, sec x e cotg x ?

Answer 1

Olá,

sen(x) = 3/5
cos(x) = -4/5

a) cossec(x) 

cossec(x) = 1/sen(x)
cossec(x) = 1/(3/5)
cossec(x) = 5/3

b) sec(x)

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

c) cotg(x)

tg(x) = sen(x)/cos(x)
tg(x) = (3/5)/(-4/5)
tg(x) = 3/5·5/-4

tg(x) = -3/4

cotg(x) = 1/tg(x)
cotg(x) = 1/(-3/4)
cotg(x) = -4/3