Answer:
G(t) = 35·sin(10t) +35
Step-by-step explanation:
You are to find a, b, d to fill in the form ...
G(t) = a·sin(bt) +d
such that the maximum and minimum values of G(t) are 70 and 0, respectively, G(0) = 35 = d, and the quarter-period is π/20 seconds.
We know "a" is the difference between the maximum value and the starting value, so ...
a = 70 -35 = 35
The value of "b" is 2π divided by the period (which is four times the quarter-period). So, we have ...
b = 2π/(4·π/20) = 10
The desired function is ...
G(t) = 35·sin(10t) +35