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

question 10

Essay

Write the word or phrase that best completes each statement or answers the question.
- $$\frac { e ^ { x } - e ^ { - x } } { 2 } = - 1$$

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Definitions:

HI

The chemical formula for hydrogen iodide, a diatomic molecule.

KOH

Potassium Hydroxide, a strong alkali used in various chemical processes and as a cleaning agent.

NaBr

Sodium bromide, a salt with various uses including in medicines, as a sedative, and in photographic processing.

React

To undergo a chemical change or transformation in response to another substance or condition.