are you looking at a graph? you need the period to find the value of B.
I understand how to find the function using the calculator, but finding the equation of the function by hand is what I need help with.
I have found A or the amplitude, D, and C.
But I do not understand how to find B by hand. Our professor told us to use the period to find it, but I do not understand how to do that.
Does my question make sense now? How do I find B?
I really appreciate your help so far. Thanks
the horizontal distance from the very bottom of the curve to the very top of the curve is half the period.
just eyeballin' , but looks about 9.6 units of horizontal distance ... so the period is roughly double that ... 19.2 units.
you can probably be more accurate with a ruler.