What is the derivative of f(t) = (1-t , sec(1-t) ) ?

$f ' \left(t\right) = \left(- 1 , - \sec \left(1 - t\right) \tan \left(1 - t\right)\right)$
$f ' \left(t\right) = \left(- 1 , - \sec \left(1 - t\right) \tan \left(1 - t\right)\right)$