F(x) can be written as: f(x) = Asin(2x); where A is the amplitude and the period of the function is half that of a normal sin function. f(π/4) = 4 4 = Asin(2(π/4)) 4 = Asin(π/2) A = 4 Amplitude of g(x) = 1/2 * amplitude of f(x) A for g(x) = 2 g(x) = 2sin(x)
