Chapter 5 expression test 1a from anwer key

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?