Establish the Identity $$\cos ^ { 2 } x - \sin ^ { 2 } x = 1 - 2 \sin ^ { 2 } x$$

question 341

Essay

Establish the identity.
- $$\cos ^ { 2 } x - \sin ^ { 2 } x = 1 - 2 \sin ^ { 2 } x$$

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Definitions:

General Journal

A comprehensive record of all financial transactions of a company, listed in chronological order.

Correcting Entry

A correcting entry in accounting is a journal entry made to amend a previously recorded error in the financial statements.

Special Journal

A special journal is an accounting journal dedicated to recording transactions of a similar type, improving efficiency and organization.

General Journal

A comprehensive record where all financial transactions of a business are initially recorded.