# Math Help - Sine Graph Equation

1. ## Sine Graph Equation

I need help! Thanks in advanced!

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.

2. ## Re: Sine Graph Equation

Originally Posted by shazi
I need help! Thanks in advanced!

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.

3. ## Re: Sine Graph Equation

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

4. ## Re: Sine Graph Equation

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

5. ## Re: Sine Graph Equation

I did, but I still don't know how

6. ## Re: Sine Graph Equation

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.