Find the Exact Value of Each Expression, If It Is $\cos ^ { - 1 } ( - \sqrt { 2 } / 2 )$

question 8

Essay

Find the exact value of each expression, if it is defined.
(a) $\cos ^ { - 1 } ( - \sqrt { 2 } / 2 )$
(b) $\sin ^ { - 1 } ( - \sqrt { 2 } / 2 )$
(c) $\tan ^ { - 1 } ( - \sqrt { 3 } )$

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Definitions:

Widow

A woman who has lost her spouse by death and has not remarried.

Seclusion

Seclusion refers to the practice of isolating a person from others, often in a confined space, for various reasons including punishment, protection, or the person's own preference.

Food Ritual

Practices or ceremonies that involve the preparation and consumption of food, often with cultural, religious, or social significance.

Rite Of Reincorporation

A ceremonial act marking the return of an individual to society with a new status, typically observed in tribal or traditional societies.