Question$2$:$22$Marks Differentiatethefollowingtotheappropriateindependentvariableandsimplifywherepossible: $(2\mathrm{.}1)(4)$ y$=1$ x$$cosx $(2\mathrm{.}2)(6)$ y$=($x$3+2)($x$22$x$+1)(2\mathrm{.}3)(6)$ y$=1+$tan$2$x sec$2$x $(2\mathrm{.}4)(6)$