1. The problem statement, all variables and given/known data Make a spreadsheet with a dimensionless column marked "t" that goes from 0 to 20 in units of 0.05. Now make columns marked "c" and "s". Integrate the functions c(t) and s(t) with the properties that: 1) c(0)=1 2) s(0)=0 3) Change in c= -s*(change in t) 4) Change in s= c*(change in t) Make a graph of c vs t and s vs t. Remind you of anything? 3. The attempt at a solution I know it's supposed to look like cos and sin curves, but what is the formula I'm supposed to input into the cells? I tried to integrate the equations and for 3) I got c= -s*(t2-t1) and for 4) I got s=c*(t2-t1) But my values get more and more negative and the graphs don't look like the cos and sin curves.