Question

Give the exact value of the trigonometric function.

Answer 1

Answer:

D) undefined

Step-by-step explanation:

we would like to simplify the following

$\displaystyle \sec \left( \frac{\pi}{2} \right)$

remember that, sec is the recipocal of cos

so,

$\displaystyle \frac{1}{\cos \left( \frac{\pi}{2} \right) }$

by unit circle we acquire

$\displaystyle \frac{1}{0}$

remember that, dividing by 0 is undefined

hence,

$\displaystyle \sec \left( \frac{\pi}{2} \right) =\rm undefined$