Question

What is the period of the function f(x)=cos4x?

Answer 1

period of \(\cos(x) = 2\pi\)

so, to find period of \(\cos(4x)\) simply equate \(4x\) to \(2pi\)

\(4x = 2\pi\)

solve \(x\)

Answer 2

So divide both sides by 4 to get \[x=\pi\]

Answer 3

\(4x = 2\pi\)

\(x = \frac{2\pi}{4}\)

Answer 4

Can I hire you through paypal as a Tutor? I can't afford to spend the next 5 days on this 25 question exam.

Answer 5

so it would be \[x=\frac{ 1 }{ 2 }\pi\]?

Answer 6

lol that wont be necessary, just tag me in your questions, il try to help :)

Answer 7

Yup !

Answer 8

period of \(\cos(4x)\) is \(\frac{\pi}{2}\)

Answer 9

Thanks!

Answer 10

np :)