You would multiply by 1.2 for example if you wanted to find 120% of 100 you would multiply by 1.2 and get 120
Nothing except when it has been polluted
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
So, the correct answer is the second option
<span>Period pi, radians; amplitude: 5</span>
