Use an Identity to Write the Expression as a Single $$\sqrt { \frac { 1 + \cos 22 ^ { \circ } } { 2 } }$$

question 107

Multiple Choice

Use an identity to write the expression as a single trigonometric function or as a single number.
- $$\sqrt { \frac { 1 + \cos 22 ^ { \circ } } { 2 } }$$

• A) \(\tan 11 ^ { \circ }\)
• B) \(\sin 11 ^ { \circ }\)
• C) \(\cot 11 ^ { \circ }\)
• D) \(\cos 11 ^ { \circ }\)

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Definitions:

Return On Investment (ROI)

A measure of profitability calculated by dividing net profit by the cost of investments.

Return On Investment (ROI)

A performance measure used to evaluate the efficiency of an investment by comparing its gain to its cost.

Contribution Margin Ratio

The proportion of revenue from each dollar of sales that goes toward covering fixed expenses and creating profit.

Fixed Expenses

Costs that do not fluctuate with changes in production level or sales volume, such as leases and insurance premiums.