# Math Help - Doubling the dimensions of a sin function

1. ## Doubling the dimensions of a sin function

Hi,
Can anyone tell me how to double the dimensions of a sin function?

2. Hello,
Originally Posted by overduex
Hi,
Can anyone tell me how to double the dimensions of a sin function?

What about $2 \sin(x)$ ?

If for example, $\sin(x)=\tfrac 12$, then $2 \sin(x)=1\dots$
you can graph it somewhere and compare !

3. Originally Posted by Moo
Hello,

What about $2 \sin(x)$ ?

If for example, $\sin(x)=\tfrac 12$, then $2 \sin(x)=1\dots$
you can graph it somewhere and compare !

Well, I was told to double the dimensions of this equation:
Y=6.984450432* sin (.3325x -2.205955718) +8.301540414
In doubling the dimensions the x and y values should stay proportional to the original line. So my question was how would you go about doubling it?
I wasn't sure if multipying the whole thing by 2 would work...
I think I tend to ask confusing questions, sorry

4. Originally Posted by overduex
Well, I was told to double the dimensions of this equation:
Y=6.984450432* sin (.3325x -2.205955718) +8.301540414
In doubling the dimensions the x and y values should stay proportional to the original line. So my question was how would you go about doubling it?
I wasn't sure if multipying the whole thing by 2 would work...
I think I tend to ask confusing questions, sorry
Well multiply the coefficient in front of the sine. It changes the amplitude. And I think this is what looks more interesting for problems. (Green curve)
The red curve is the original one.
The blue curve is the original curve all multiplied by 2. Just here so that you can compare them.

As for this thread and the other one, I suggest you have a look here : Amplitude and Period

5. Originally Posted by Moo
Well multiply the coefficient in front of the sine. It changes the amplitude. And I think this is what looks more interesting for problems. (Green curve)
The red curve is the original one.
The blue curve is the original curve all multiplied by 2. Just here so that you can compare them.

As for this thread and the other one, I suggest you have a look here : Amplitude and Period
Thanks for answering my questions! Now, just out of curiosity, what program did you use to graph the lines?

6. Originally Posted by overduex
Thanks for answering my questions! Now, just out of curiosity, what program did you use to graph the lines?
It can be found here : Graph