Use Addition or Subtraction Formulas to Find the Exact Value $\tan \left( - 15 ^ { \circ } \right)$

question 42

Essay

Use addition or subtraction formulas to find the exact value of $\tan \left( - 15 ^ { \circ } \right)$ .

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Definitions:

Net Income

The total earnings of a company after subtracting all expenses, taxes, and costs from total revenue.

Depreciation Expense

The allocated amount of the cost of an asset, spread out over the time it is expected to be used, reflecting its consumption, wear and tear, or obsolescence.

Indirect Method

In cash flow calculation, this method adjusts net income for non-cash transactions and changes in working capital to arrive at net cash provided by operating activities.

Net Loss

The negative financial result that occurs when a company's expenses exceed its revenues.