Question

Evaluate the function f(x) = sec(x - pi/2) for x = 0.

Answer 1

`\sec\left(0-(\pi)/(2)\right)=\sec\left(-(\pi)/(2)\right)=(1)/(\cos \left(-(\pi)/(2)\right))=(1)/(0)`

So, the function
`f(x)` for
`x=0` is undefined.