Find the Largest Interval on Which the Function $f ( \theta ) = \cos ^ { 2 } \theta$

question 186

Essay

Find the largest interval on which the function $f ( \theta ) = \cos ^ { 2 } \theta$ is concave upward.

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Definitions:

General Adaptation Syndrome

A three-stage response (alarm, resistance, exhaustion) that the body has to stress.

Skeletal Muscles

The muscles connected to bones that are responsible for voluntary movements of the body parts.

Tend-And-Befriend

A theory suggesting that in response to stress, individuals (particularly females) are predisposed to nurture (tend) and seek social support (befriend) rather than fight or flee.

Sympathetic Nervous System

A segment of the autonomic nervous system responsible for initiating the so-called fight or flight response.