What is the period of the sinusoidal function?

(I need this as soon as possible!)

The period of the sinusoidal function is 4.

Step-by-step explanation:

In order to find the period, we can use below definition of period.

The time requires to complete a full cycle is called period. In other words, the length of a complete cycle is called period.

From the given figure, we can see that the sinusoidal function the length of a complete cycle is 4.

Therefore, the period of the sinusoidal function is 4.

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

i honestly dont know