Find the Expression as the Cosine of an Angle $$\cos \frac { \pi } { 5 } \cos \frac { \pi } { 3 } - \sin \frac { \pi } { 5 } \sin \frac { \pi } { 3 }$$

question 27

Multiple Choice

Find the expression as the cosine of an angle. ​​ $$\cos \frac { \pi } { 5 } \cos \frac { \pi } { 3 } - \sin \frac { \pi } { 5 } \sin \frac { \pi } { 3 }$$ ​

• A) \(\sin \frac { 15 \pi } { 8 }\)
• B) \(\cos \frac { 15 \pi } { 8 }\)
• C) \(\cos \frac { 8 \pi } { 15 }\)
• D) \(\cos \frac { \pi } { 15 }\)
• E) \(\sin \frac { 8 \pi } { 15 }\)

---

Definitions:

Loans

Money or items of value provided to a borrower with the expectation of future repayment plus interest.

Federal Funds Market

A financial market that allows banks to borrow and lend excess reserves to one another, usually overnight, at an interest rate called the federal funds rate.

Short-Term Loans

Short-term loans are borrowing options designed to be repaid within a short period, typically less than a year, used by individuals or businesses for immediate financial needs.

Excess Reserves

The amount of reserves that a bank holds in excess of the minimum reserve requirements set by central banking authorities.