Use an Addition or Subtraction Formula to Write $\frac { \tan 10 ^ { \circ } + \tan 20 ^ { \circ } } { 1 - \tan 10 ^ { \circ } \tan 20 ^ { \circ } }$

question 72

Essay

Use an addition or subtraction formula to write $\frac { \tan 10 ^ { \circ } + \tan 20 ^ { \circ } } { 1 - \tan 10 ^ { \circ } \tan 20 ^ { \circ } }$ and find its exact value.

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Definitions:

Cash

Liquid assets held by a company, used to settle debts, purchase goods and services, or meet immediate needs; a fundamental indicator of financial health.

Debt Ratio

A financial ratio that measures the proportion of a company's total debt to its total assets, indicating the company's leverage.

Liabilities

Financial obligations or debts owed by a business to external parties or individuals, which must be settled over time through the transfer of economic benefits.

Equity

The ownership interest in a company of its shareholders; it represents the amount of assets that would be returned to shareholders if all the company's debts were paid off.