Question

can you please tell me what is the sec of (-855 degrees). and how to find it. thnks

Answer 1

first of all in terms of ± the sec behaves like the cosine, so
sec(-855) = sec(855)
= sec (135) , I took away two rotations
= -sec(45)
= -√2 (since cos 45 = 1/√2, sec 45 = √2/1)

Answer 2

ok i get it
thank you very much for ur help=]

Answer 3

Good