Find the Exact Value $\frac { \tan 10 ^ { \circ } + \tan 20 ^ { \circ } } { 1 - \tan 10 ^ { \circ } \tan 20 ^ { \circ } }$

question 9

Essay

Find the exact value. $\frac { \tan 10 ^ { \circ } + \tan 20 ^ { \circ } } { 1 - \tan 10 ^ { \circ } \tan 20 ^ { \circ } }$

---

Definitions:

Net Price Method

Net price method is a pricing strategy that accounts for discounts, rebates, and other incentives upfront, presenting the final price to consumers.

Sales Discounts

Reductions granted by a seller to the buyer for early payment or for meeting other conditions defined in the sales agreement.

Gross Sales

Gross sales refer to the total sales revenue of a company without deducting any sales returns, allowances, or discounts.

Selling Expenses

Costs incurred directly in the selling of goods or services, including advertising, sales staff salaries, and commissions, which are often reported separately from general and administrative expenses.