1. The limit represents the derivative of a functiony=f(x) at some numbera. Find the functionfand the value ofa.

cos(It + h) + 1 lim h - 0 h O f(x) = cos(x), a = 4 Of( x) = cos(x), a = Of(x) = cos(x), a = 0 Of(x) = cos(x), a = TC 3 Of(x) = cos(x), a =