Question

Determine: a) sec 30°; b) cossec 30°; c) cotg 60°; d) sec 315º; e) cotg 240º.

Answer 1

Bom dia

a) sec 30° = 1/cos(30) = 1/(√3/2) = 2√3/3
b) cossec 30° = 1/sen(30) = 1/(1/2) = 2
c) cotg 60°  = 1/tg(60) = 1/√3 = √3/3
d) sec 315º; = 1/cos(315) = 1/cos(45) = 1/(1/√2) = √2
e) cotg 240º.= √3/3