How does the frequency of f(x) = cos(2x) relate to the frequency of the parent function cos x?

The frequency of f(x) is two times the frequency of the parent function.

Step-by-step explanation:

We can say that the number that is beside the x is equal to , where f is the frequency.

Then, for the parent function, we get:

or solving for :

At the same way, for f(x), we get:

But is equal to , so we can write the last equation as:

It means that the frequency of f(x) is two times the frequency of the parent function.

what are the statements

step-by-step explanation:

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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