How to find the amplitude?

how to

How to find the amplitude?
I have a table with data of temperature over the years. It is a periodic function since the temperature increases during the summer and decreases in the winter.

I am now going to use this formula to create a cosine wave : y = a sin (bx+c)
I am going to find y and i have the rest of the values.

But how do i find a (the amplitude) in the table of data?
Is it simply the highest value or is there a formula to find it?

Keep in mind i dont have the graph yet because that is what i am going to create.

Best answer:

Answer by ◇✰ |ぐぶ✚だしιての ◆✐ 【☒ⒹⒿ☒】ヒトグアざロ ナんミ ウヨれιびる™
|a| represents the amplituded of the sine function, which yields the highest value.

I hope this helps!

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