Sinusoidal graphs (y=sinx and y=cosx equations)

[becca_j]

i was wondering how you would find the amplitude, vertical translation, horizontal translation and the sinusoidal axis either from just an equation, like 1/2(y-7)=cos3(x-60), or from the graph if you are given one.

 

[mathman]

Write it in the form y= and the items you want would be obvious.

amplitude = 2, vertical (also axis) = 7, period = 2pi/3