1. The graph has period: 8pi, amplitude: 5, and equation:

f(t)=a+bcos(dt-c)

Determine the constants a, b, c and d and explain clearly how you get each constant



2. Let f(x)=sqrt(x-1)

and g(x)=x^2

Define functions:

h1=fog, h2=gof, h3=fof (o=composed with)

Find each of the functions h1, h2, h3 and their domains



Please help with these questions, they are the last ones on my assignment and I'm getting really stuck.

Would be much appreciated :)

Thank you