Answer:
y=3sin(x)
Step-by-step explanation:
The best way to check if it's right is to use a graphing calculator. The negative trigonometric functions are going upwards from 1pi to 2pi and the positive ones are going downwards from 1pi to 2pi. Since the cos sign is shifted two units left, we can assure that 3sin(x) gives the most accurate answer.
