### sine and cosine graphs...

I hope this can help most of you guys in figuring out how the graphs work...

sin graphs always start at zero (only if there is no vertical shift)

+ cos graphs start at the **MAX** point

-cos graphs start at the **MIN** point

These graphs have zero vertical shift and zero horizontal shift... so it's just the basic form of the graphs...

Also...

sin -360= 0

sin -270= 1

sin-180= 0

sin -90= -1

sin 0= 0

sin 90= 1

sin 180= 0

sin 270= -1

sin 360= 0

cos -360= 1

cos -270= 0

cos -180 = -1

cos -90= 0

cos 0= 1

cos 90= 0

cos 180= -1

cos 270= 0

cos 360= 1

I know this isn't that much of a help since these are obvious data in periodic graphs...

y=* a*sin*x* + *k* y= *a*cos*x* + *k*

k= vertical shift

a= amptitude... (did i spell it right?) or also known as the stretch factor of a periodic graph

Well... that's how i understood the stuff...

Hope this can actually help...

Sorry if the post was made this late coz i was finishing some other stuff...

## 3 Comments:

Thanks man! This helps a lot.

1:16 AM

Thanks Miles,

I, along with most of your classmates, appreciate you taking the time and initiative and doing this when you didn't have to. Bravo!

Mr.M

7:26 AM

nice

9:18 PM

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