Verify the Given Identity $$\frac { \sin u + \sin v } { \cos u + \cos v } = \tan \frac { 1 } { 2 } ( u + v )$$

question 111

Essay

Verify the given identity.
$$\frac { \sin u + \sin v } { \cos u + \cos v } = \tan \frac { 1 } { 2 } ( u + v )$$

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Definitions:

Comparative Balance Sheet

A financial statement that presents the assets, liabilities, and equity of a company at different points in time for comparison.

Vertical Analysis

An approach to analyzing financial statements where every item listed under the key account categories of assets, liabilities, and equity is shown as a percentage of the total figure for that category.

Horizontal Analysis

A financial analysis technique that compares line items in financial statements over a period of time, to identify trends or significant changes.

Liquidity Analysis

An assessment of a company's ability to meet its short-term financial obligations, involving the examination of assets that can be quickly converted into cash.