The desert temperature, H, oscillates daily between 36ºF at 6am and 76ºF at 6pm. Write a possible formula for H in terms of t, measured in hours from 6am. Use the form
H = A cos(Bt) + C.
Ok, so I'm setting this up like this...
A = 20 (I subtracted 36 from 76 and divided it in half)
B = 1pi/6 (the number of hours, 12 hours between 6am and 6pm and then reduced it)
C = 36
I know these values are wrong, but i cant set this up correctly :( can anyone help me out?