Write the Word or Phrase That Best Completes Each Statement $$\cos \left( x + \frac { \pi } { 2 } \right) = - \sin x$$

question 273

Essay

Write the word or phrase that best completes each statement or answers the question.
Establish the identity.
- $$\cos \left( x + \frac { \pi } { 2 } \right) = - \sin x$$

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Definitions:

Tropical Diseases

Infectious diseases that are prevalent in or unique to tropical and subtropical regions, often transmitted by insects or contaminated water.

Conquistadors

Spanish explorers and soldiers who participated in the conquest of the Americas in the 16th century, often for gold, glory, and the spread of Christianity.

Mexica

Refers to the indigenous people who were the rulers of the Aztec Empire, centered in what is now Mexico City, before the Spanish conquest in the 16th century.