1. If h(x) = tan x, nd: (a) h(rt/6), (b) h(x - rt/Z), (c) h(x). 2. For the function f(x) = sin x, show with the aid of of the formula sin2A = 1/2 (1 cos 2A) that f(x+y) - f(x) = cosx sin y - 2 sin x sin2 (y/2)