Is this graph and example of sun or cos graph?

See attachment below and find the equivalent of tan(∠qsr)

Pamela has a 30-year, 5.75% mortgage on her $250,000 home. she has been paying on it for 5 years, and has recently hit some financial trouble. if her lender agreed to lower the interest rate on her $231,905.47 balance to 5.5%, what will her new payment be for the remainder of the loan?

Quadrilateral abcd is a parallelogram with diagonals that intersect at point e. which of the following statements is true?