Answer
$s'=5(sec(t)tan(t)+sec^2(t))(sec(t)+tan(t))^4$
Work Step by Step
Take the derivative of the equation using Trigonometric derivatives and Chain Rule:
$s'=5\times(sec(t)+tan(t))^4\times(sec(t)tan(t)+sec^2(t))$
$=5(sec(t)tan(t)+sec^2(t))(sec(t)+tan(t))^4$