I have no idea where to begin can someone please help me out....
At 40 degrees north latitude the the number of hours of sunlight on a given day can be found by
D(t)=12-3cos[2pie(t+10)/365]
where t is measuredin days and t=0 is January 1st.
1. Find D'(t)
2. Find and interpret D'(59)
(note t=59 corresponds to March 1st)

Question

I have no idea where to begin can someone please help me out....
At 40 degrees north latitude the the number of hours of sunlight on a given day can be found by
D(t)=12-3cos[2pie(t+10)/365]
where t is measuredin days and t=0 is January 1st.
1. Find D'(t)
2. Find and interpret D'(59)
(note t=59 corresponds to March 1st)

anonymous · Answer

This is the equation in the question$$D(t)=12-3\cos[\frac{ 2\pi(t+10) }{ 365}]$$