Can anybody help me with this problem in math ? asap .

Find the cosine function that is represented in the graph.

The measure of angle 0 is 600 degrees

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.