Find the Exact Value of the Given Expression Using a Sum

question 62

Multiple Choice

Find the exact value of the given expression using a sum or difference formula. $\cos \frac { 13 \pi } { 12 }$

• A) \(\frac { \sqrt { 3 } + 1 } { 2 \sqrt { 2 } }\)
• B) \(\frac { - \sqrt { 3 } + 1 } { 2 \sqrt { 2 } }\)
• C) \(\frac { \sqrt { 3 } - 1 } { 2 \sqrt { 2 } }\)
• D) \(\frac { - \sqrt { 3 } - 1 } { 2 \sqrt { 2 } }\)

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Definitions:

Directors

Individuals elected by shareholders to oversee and make high-level decisions for a corporation, forming its board of directors.

Stockholders' Equity

The residual interest in the assets of a corporation that remains after deducting its liabilities, representing the ownership interest of shareholders.

Investments Contributed

The act of providing capital in the form of investment assets to a company or project without immediate expectation of returns.

Net Income

The total profit of a company after all revenues and gains are accounted for and all expenses and losses are deducted.