Question

Evaluate sec(4pi)

Answer 1

you know that
\[\sec(x)=\frac{ 1 }{ \cos(x) }\]

Answer 2

let x=4pi
substitute in your x value

Answer 3

sec(4pi)= 1/cos(4pi)?

Answer 4

so 1/cos(4pi)= 1 and that's the answer right?

Answer 5

yes