Question

Find the period of the function.

y = -5 cos x

Answer 1

@abb0t can you helppp

Answer 2

I can.

Answer 3

yay!!!!!!!!!!!!!!!:D

Answer 4

You have to find \(p\) such that: \[
-5\cos(x) = -5\cos(x+np), \quad n\in \mathbb{N}
\]But that is really troublesome.

Answer 5

We know that \(\cos\)'s period is just the angle of a full revolution.

Answer 6

So in degree mode it is \(360^\circ\), and in radian mode \(2\pi\), and in revolutions it is \(1\).

Answer 7

yes!

Answer 8

ahh so the answer is 2pi right?

Answer 9

Yeah.

Answer 10

thankyouu