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

question 23

Essay

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

---

Definitions:

Windows Operating System

A series of graphical interface operating systems developed, marketed, and sold by Microsoft, supporting personal computers, tablets, and smartphones.

Live Preview

A feature that allows users to see a preview of changes, such as formatting, before applying them.

Multiple Apps

The capability or instance of using or running more than one application simultaneously on a device.

Windows 10

An operating system developed by Microsoft, providing a platform for personal computer applications and services.