Question

Question #56859

Answer 1

-2

Explanation:

Use Trig Table and unit circle:
`sec ((22pi)/3) = 1/(cos)`
First, find `cos ((22pi)/3)`
`cos ((22pi)/3) = cos [(-2pi/3) + ((24pi)/3)] =`
`= cos ((-2pi/3) + 4(2pi)) = cos ((-2pi)/3) = cos ((2pi)/3) = -1/2`
Finally,
`sec ((22pi)/3) = 1/(cos) = -2`