Prove the Identity $$\tan ^ { 5 } x = \tan x \left( \sec ^ { 4 } x - 2 \sec ^ { 2 } x + 1 \right)$$

question 310

Essay

Prove the identity.
- $$\tan ^ { 5 } x = \tan x \left( \sec ^ { 4 } x - 2 \sec ^ { 2 } x + 1 \right)$$

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Definitions:

Expense Recognition

A principle in accounting that dictates when costs are recognized as expenses in the financial statements, often aligned with the revenue they helped to generate.

Cash Basis

An accounting method where revenues and expenses are recorded when cash is received or paid, not when the obligation is incurred.

Comparability

An accounting principle that ensures financial statements can be compared between periods and across companies.

Financial Statements

Consolidated reports that summarize the financial performance, position, and cash flows of a business over a specified period.