Write the Product as a Sum $\cos 7 x \cos 3 x$

question 97

Multiple Choice

Write the product as a sum. $\cos 7 x \cos 3 x$

• A) \(\cos 7 x + \cos 3 x\)
• B) \([ \cos 7 x + \cos 3 x ] / 2\)
• C) \([ \cos 10 x + \cos 4 x ] / 2\)
• D) \(- [ \cos 5 x + \cos 2 x ] / 2\)
• E) none of these

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Definitions:

Contingencies

Possible, future events or conditions that might affect the outcome of a plan or project, often requiring planning for different scenarios.

Disjunct

One of the alternatives or options presented in a disjunctive proposition or statement.

Disjunction

A logical operation yielding true if at least one of its operands (propositions) is true.

Self-Contradiction

A statement that directly contradicts itself, demonstrating a falsehood.