Answer:
Correct option is B.
Explanation:
Given some equations we have to choose the equation which can be used to model simple harmonic motion.
The basic equation for simple harmonic motion are
x = acos(wt) and x=asin(wt)
where x is displacement from resting position,
a is the amplitude, which is the largest displacement the object experienced, w is the angular velocity or angular frequency and t is the time.
From the given options B option matches i.e
d=acos(wt)
is the equation can be used to model simple harmonic motion.
So, correct option is B.