Decide Whether the Expression Is or Is Not an Identity $$\sqrt { \sec ^ { 2 } x - \tan ^ { 2 } x } = 0$$

question 320

Multiple Choice

Decide whether the expression is or is not an identity.
- $$\sqrt { \sec ^ { 2 } x - \tan ^ { 2 } x } = 0$$

• A) Identity
• B) Not an identity

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Definitions:

Agonist

A chemical or drug that binds to receptors in the brain and causes a reaction similar to that of a naturally occurring neurotransmitter.

Excitatory Signal

A type of neurotransmitter-induced signal in the nervous system that increases the likelihood of a neuron firing an action potential.

Action Potential

A sudden increase and subsequent decrease in the voltage across a cell membrane resulting from the movement of charged particles.

Neural Communication

The process by which neurons transmit signals to each other through synapses, using both electrical and chemical means.