Use a Product-To-Sum Formula to Convert the Expression to a Sum

question 6

Multiple Choice

Use a product-to-sum formula to convert the expression to a sum or difference. Simplify where possible. $\cos 47 ^ { \circ } \cos 43 ^ { \circ }$

• A) \(\frac { 1 } { 2 } \left( 1 + \sin 4 ^ { \circ } \right)\)
• B) \(\sqrt { 2 } \cos 2 ^ { \circ }\)
• C) \(\frac { 1 } { 2 } \cos 4 ^ { \circ }\)
• D) \(- \frac { 1 } { 2 } \cos 4 ^ { \circ }\)
• E) \(\frac { 1 } { 2 } \left( 1 - \sin 4 ^ { \circ } \right)\)

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Definitions:

Goods-Producing Firms

Businesses that produce physical products as opposed to services, engaging in manufacturing, construction, or mining.

Graphic Approach

A method that uses visual or graphical representations to analyze and solve mathematical problems or data-related tasks.

Location Break-Even

An analysis to determine the point at which cost or expenses and revenue are exactly equal, taking into consideration the impact of location on these figures.

Volume Range

The spectrum of production output quantities that a manufacturing system or process can handle, from minimum to maximum volumes.