Write the Word or Phrase That Best Completes Each Statement $$1 + \sec ^ { 2 } x \sin ^ { 2 } x = \sec ^ { 2 } x$$

question 29

Essay

Write the word or phrase that best completes each statement or answers the question.
Establish the identity.
- $$1 + \sec ^ { 2 } x \sin ^ { 2 } x = \sec ^ { 2 } x$$

---

Definitions:

Net Operating Income

A measure of a company's profitability, calculated as the difference between its total revenue and its total operating expenses, excluding taxes and interest.

For The Month

A time-based reference indicating that an action, report, or measurement pertains to the duration of a specific month.

Variable Costing

An accounting method that includes only variable production costs in the cost of goods sold and treats fixed production costs as period expenses.

Net Operating Income

The profit generated from a company's core business operations, distinct from earnings from investments or tax effects.