AD=9 think this is correct not 100% sure
Answer:
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You can use the Pythagoras theorem for this since a right triangle is formed.
C = 12
A = 4
B = x
Input values:
So, about 11ft.
The required equation is :
Now, let's find the required values :
period (p) = 4
[distance between any successive Crest or trough]
a = - 3 (flipped)
b = 2π/p = 2π/4 = π/2
k = 1
Distance of starting position from origin = k
Now, plug in the values ~