Prove the Identity $$\tan ^ { 2 } x = \sec ^ { 2 } x - \sin ^ { 2 } x - \cos ^ { 2 } x$$

question 133

Essay

Prove the identity.
- $$\tan ^ { 2 } x = \sec ^ { 2 } x - \sin ^ { 2 } x - \cos ^ { 2 } x$$

---

Definitions:

Tactical Decisions

Decisions that focus on the short-term strategies and day-to-day operations of a business.

Overhead Costs

Indirect costs that cannot be directly attributed to specific products or services, such as utilities, rent, and managerial salaries.

Decision-making Model

A structured approach to making choices among alternatives, often involving steps such as problem identification, alternative generation, and evaluation.

Special Order

A one-time customer order for a product or service, often requiring a unique set of specifications or considerations outside regular offerings.