Question

Why does sec(pi/4)= sqrt2?

Answer 1

Why does `sec (pi/4) = sqrt2`

Explanation:

`sec ((pi)/4) = 1/(cos (pi/4))`
Trig Table of Special arcs gives --> `cos (pi/4) = sqrt2/2.`
Therefor
`sec (pi/4) = 2/sqrt2 = sqrt2`