Find the Exact Value of the Function $\frac { \sqrt { 3 } } { 2 }$

question 138

Multiple Choice

Find the exact value of the function. Rationalize the denominator if necessary.
-cos (-630°)

• A) 0
• B) \(\frac { \sqrt { 3 } } { 2 }\)
• C) 1
• D) Undefined

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Definitions:

Pyranose Forms

The six-membered oxygen-containing heterocyclic forms of monosaccharides or sugars.

Monosaccharide

The simplest form of carbohydrates, consisting of a single sugar molecule, such as glucose or fructose.

Cyclic Hemiacetals

Compounds formed from the reaction between an aldehyde and an alcohol under acidic conditions, resulting in a ring structure containing both an alcohol and an ether (or alkoxy) group.

Pyranoses

Ring forms of six-membered sugar molecules that result from intramolecular hemiacetal formation, where the oxygen atom is part of the ring.