Brightness of Delta Cephei
Albert, astronomy amateur, notices that
the brightness of Delta Cephei periodically increases and decreases.
He wonders how fast does its brightness changes at time equals 1day?
What is known:
- The brightness cycles every 5 days
- The brightness of the star is modeled by the function:
B(t) = 4 + 0.35 sin(2πt/b)
- The time, t, is 1 day.