Write an equation of the form whose graph is the sine wave shown above. The curve goes through the points and .
I forget how to do this.
There is more than one possible solution here that I can see.
I'm happy to help but we need to focus on the one you require. First thing to do is draw a sine function that goes through these 2 points.
I have one in mind. It has the y-intercept at (0,4) and half way through the cycle returns to (2,4). Can you draw a picture of that?
If so what is the period of the function?
http://imageshack.us/photo/my-images/222/sinfl.png/
here's the link.