# Sine Graph Equation

• Feb 4th 2013, 02:09 PM
shazi
Sine Graph Equation
I need help! Thanks in advanced!
Attachment 26858
The curve above is the graph of a sinusoidal function. It goes through the point (0,1) and (4,1). Find a sinusoidal function that matches the given graph.
• Feb 4th 2013, 02:38 PM
Plato
Re: Sine Graph Equation
Quote:

Originally Posted by shazi
I need help! Thanks in advanced!
Attachment 26858
The curve above is the graph of a sinusoidal function. It goes through the point (0,1) and (4,1). Find a sinusoidal function that matches the given graph.

You are looking for three numbers $a\sin(bx)+c$ to do that.

Hint: $\frac{-\pi}{2}$ is one of them.
• Feb 4th 2013, 02:42 PM
shazi
Re: Sine Graph Equation
I am pretty sure c is 1, but how do I find a or b?
• Feb 4th 2013, 02:44 PM
Plato
Re: Sine Graph Equation
Quote:

Originally Posted by shazi
I am pretty sure c is 1, but how do I find a or b?

• Feb 4th 2013, 02:46 PM
shazi
Re: Sine Graph Equation
I did, but I still don't know how
• Feb 4th 2013, 03:06 PM
Plato
Re: Sine Graph Equation
Quote:

Originally Posted by shazi
I did, but I still don't know how

Take a graphing calculator and try some possibilities.

You say $c=1$ and I told you that $-\frac{\pi}{2}$ is one other answer.