the first question is :
Find the time when I = 20sin(0.2(π)(t)+ π/3) is maximum : 0 ≤ t ≤ 12
and the second one is :
how to find I from the graph when t is given
I = 4sin100t + 3cos100t
for the second question what I did was, I made a table, assumed values from -5 to 5 and graphed, but I didn't know how to find I.
Any help would be greatly appreciated, I have a exam and am stuck with these 2 questions.