Q. What is the period ofy=−5cos(8πx)+3?Give an exact value.units
Identify Standard Form: Identify the standard form of a cosine function and its period.The standard form of a cosine function is y=Acos(Bx−C)+D, where:- A is the amplitude,- B affects the period of the function,- C is the phase shift, and- D is the vertical shift.The period of the standard cosine function cos(x) is 2π. For the function y=Acos(Bx−C)+D, the period is given by the formula Period=∣B∣2π.
Determine Value of B: Determine the value of B in the given function.In the given function y=−5cos(8πx)+3, the value of B is 8π.
Calculate Period: Calculate the period of the given function using the formula.Using the formula Period=∣B∣2π, we substitute B with 8π:Period=∣8π∣2π=8π2π=2π×π8=16.
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