Write the Word or Phrase That Best Completes Each Statement $$\frac { \cos x } { \sec x - 1 } - \frac { \cos x } { \sec x + 1 } = \frac { 2 \cos x } { \tan ^ { 2 } x }$$

question 21

Essay

Write the word or phrase that best completes each statement or answers the question.
Establish the identity.
- $$\frac { \cos x } { \sec x - 1 } - \frac { \cos x } { \sec x + 1 } = \frac { 2 \cos x } { \tan ^ { 2 } x }$$

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Definitions:

Medical Device

A medical device is any instrument, apparatus, implement, machine, appliance, implant, reagent for in vitro use, software, material, or other similar or related article, intended by the manufacturer to be used, alone or in combination, for a medical purpose.

Express Warranties

Explicit assurances provided by a seller regarding the quality, condition, or performance of a product or service.

Marketing Brochures

Printed promotional documents used to describe and advertise products or services offered by a business.

Puffery

Exaggerated or hyperbolic claims made by a seller about a product or service, often considered legal and not literally true.