Question

What is the frequency of the function f(x)? f(x)=3cos(5x)+2

Enter your answer, in simplest fraction form, in the box

Answer 1

The Answer is frequency

= (pi)/(2pi)

= 1/2 freq

Answer 2

Explanation:

The easiest way to do this is to get the period correct first.

If the function f(x) = cos(B * x) then the period is

P = 2*pi/B In this case B = 5

P = 2* pi/5

The frequency is the reciprocal of the period

f = 1/p

f = 1/(2pi/5) Now all you do is turn 2p/5 upside down.

f = 5/2*pi <<<< Answer

I don't know how simple your marker considers this, but it is the answer.