Use the Addition Formulas To Calculate $\cos \left( \frac { \pi } { 3 } \right)$

question 61

Multiple Choice

Use the addition formulas: $$\begin{array} { l } \sin ( x + y ) = \sin x \cdot \cos y + \cos x \cdot \sin y \\\sin ( x - y ) = \sin x \cdot \cos y - \cos x \cdot \sin y \\\cos ( x + y ) = \cos x \cdot \cos y - \sin x \cdot \sin y \\\cos ( x - y ) = \cos x \cdot \cos y + \sin x \cdot \sin y\end{array}$$
To calculate $\cos \left( \frac { \pi } { 3 } \right)$ , given that $\sin \left( \frac { \pi } { 6 } \right) = \frac { 1 } { 2 }$ and $\cos \left( \frac { \pi } { 6 } \right) = \frac { \sqrt { 3 } } { 2 }$ .

• A) \(\cos \left( \frac { \pi } { 3 } \right) = 0\)
• B) \(\cos \left( \frac { \pi } { 3 } \right) = \frac { \sqrt { 3 } } { 2 }\)
• C) \(\cos \left( \frac { \pi } { 3 } \right) = \frac { 1 } { 2 }\)
• D) \(\cos \left( \frac { \pi } { 3 } \right) = - \frac { \sqrt { 3 } } { 2 }\)
• E) \(\cos \left( \frac { \pi } { 3 } \right) = - \frac { 1 } { 2 }\)

Grasp the relationship between market valuations like the price-earnings ratio and underlying financial performance metrics.

Identify the impact of operational decisions on financial statements, including the effects on turnover ratios and working capital.

Assess the implications of financing decisions on financial ratios and company valuation.

Distinguish between the effects of various types of liabilities and equity on company's financial structure and ratios.

---

Definitions:

Selecting Employees

The process of interviewing and assessing candidates to fill job positions within an organization.

Foreign Assignments

Job postings located outside of an employee's home country, often involving international relocation and cross-cultural adaptation.

Type I Error

Occurs when a true null hypothesis is incorrectly rejected.

Cheated

Engaged in dishonest behavior to gain an unfair advantage, often in a context such as an exam or competition.