What is the amplitude of f (0)=-1/2sin0

Question

The multiple choices are 

A. 1/2

B. -1/2

C. 2

D. -2

Answer 1

If y = Asin(Bθ+C)+D, then the amplitude is lAl.

 

So, for f(θ) = (-1/2)sinθ, the amplitude is l-1/2l = 1/2.  (ANSWER:  A)