Use the Sum-To-Product Formulas to Find the Exact Value of the Given

question 19

Multiple Choice

Use the sum-to-product formulas to find the exact value of the given expression. $\cos 150 ^ { \circ } - \cos 30 ^ { \circ }$

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

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Definitions:

Cytoplasm

The jelly-like substance within a cell that contains the organelles and is enclosed by the cell membrane.

Nuclear Membranes

The double-layered membrane surrounding a cell's nucleus, controlling the passage of substances in and out of the nucleus.

Cytoplasm

The jelly-like substance within a cell, excluding the nucleus, that contains organelles and is the site of most cellular processes.

Food And Drug Administration

A federal agency of the United States responsible for regulating and supervising the safety of foods, dietary supplements, drugs, cosmetics, and medical devices.