The general equation of the cosine function is y = a cos nθ where a is the amplitude And n = 2π/period
by comparing the general equation with the given equation which is <span>Y = 5 cos 2</span>θ ∴ a = 5 and n = 2 ∴ period = 2π/n = 2π/2 = π ∴ The amplitude = 5 and the period = π
