Answer:
and 
Step-by-step explanation:
Recall that
is a value of the function cosine for the special angles:
and
, then:

Black socks on monday - 3/9 or .33%.
white socks on tuesday - 5/9 or .55%
Explanation: Probability of black socks on Monday:
Total pair of socks: 1 + 3 + 5 = 9
Number of black socks on Monday: 3
3/9 = 1/3 (or divide to get a percentage)
Probability of white socks on Tuesday:
Total pair of socks: 9
Number of white socks on Tuesday: 5
5/9
I’m pretty sure it’s 2 but i’m not 100 percent on that