Question

I need help finding periods of sinusoidal functions

Answer 1

I love this image

Answer 2

so as you can see, it's tip to tip

Answer 3

the red markings are a little off but you get my idea

Answer 4

Yes i get that but my problem is when I multiply, how do I know its half the graph or a 1/4th ect

Answer 5

multiply?

Answer 6

to find the period i must do 5.1-(-1.7)* something, right?

Answer 7

I'm not sure what you're talking about but I noticed you're using khan academy, don't they give you answers afterwards?

Answer 8

They do, but i don't understand how they get the answer

Answer 9

How do i find the period?

Answer 10

oh, can I see their explanation

Answer 11

ohh okay first do you understand why it's the distance between -1.7 and 5.1 ?

Answer 12

those points are the middle of the relative max and min

Answer 13

so if you get the distance between those values, you only need to double it

Answer 14

Oh ok

Answer 15

do you understand though? >-<

Answer 16

No lol, because another question said to multiply by four because its a 1/4 of a graph

Answer 17

example this

Answer 18

if you had for example this, you would need to multiply the distance between the red markings by four to get it

Answer 19

right that's multiplying by four because it's only a fourth of the whole tip to tip thought

Answer 20

yes how do i know that?

Answer 21

that its a fourth of the tip to tip

Answer 22

you can think it out, you need four exact same more segments of that to get from one tip to the next

Answer 23

Ok i get i because one confused me because they showed the same one I showed you now and t said I needed to multiply it by two even though it looked like a fourth

Answer 24

so you're good now?

Answer 25

Yes, thank you

Answer 26

yw~