(a) Find the amplitude, period, and phase shift of y = 3sin[(x 1/3)] (b) A ladder...

Question:

(a) Find the amplitude, period, and phase shift of y = 3sin[π(x – 1/3)]
(b) A ladder leans against a verfical wall of a building so that the angle between the ground and the ladder is 72° and its bottom on the ground is at 3m from the wall. How long is the ladder? How high does it reach?