7. This equation describes the SHM of an object: y = Asin(2t/T). Its position (y) three-quarters of...

7. This equation describes the SHM of an object:

y = Asin(2πt/T). Its position (y) three-quarters of the period after the motion starts is

(a) +A,

(b) −A,

(c) A/2,

(d) 0.