Question

Find the amplitude of y = -2 sin x. (2 points)

Answer 1

Answer:

Step-by-step explanation:

y = 0.9 sin 4π[t - x/2]. When it is reflected at a rigid

support, its amplitude becomes 2/3 of its previous value.

The equation of the reflected wave is

(a) y = 0.6 sin 4π[t + x/2]

(b) y = -0.6 sin 4π[t + x/2]

(c) y = -0.9 sin 8π[t - x/2]

(d) y = -0.6 sin 4π[t + x/2]