Prompt: Use the provided template to complete the trigonometric identity proof above and illustrate your process by addressing each of the following elements: I. Indicate each step of your process in the "Statement" column. A. Identify the problem statement. B. Correctly use the identities and/or theorems. C. Correctly use the algebraic process. D. Identify the final statement. II. Defend your process by identifying the appropriate explanation for each process step in the "Rule" column.