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

question 92

Essay

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

Understand the importance and elements of effective business communication.

Identify and apply positive language in business communication.

Distinguish between formal and informal tones in business writing.

Recognize formal research methods and their applications in business.

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Definitions:

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Spontaneous erections of the penis during sleep or when waking up, also known as "morning wood."

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The external and internal organs of the reproductive system, responsible for sexual reproduction.

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A condition involving involuntary contraction of the vaginal muscles, causing discomfort, pain, and difficulty with intercourse.

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The impaired or abnormal functioning of a bodily system or organ, often leading to various health issues.