Use the Sum-To-Product Formulas to Rewrite the Sum or Difference

question 64

Multiple Choice

Use the sum-to-product formulas to rewrite the sum or difference as a product. ​
Cos 3θ + cos 8θ
​

• A)​
• B)​
• C)​
• D)​

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Definitions:

Imprinting

A form of rapid learning occurring at a particular life stage, where an animal forms an attachment to a certain object or organism.

Fixed-Action Pattern

A sequence of innate behaviors that is both unchangeable and, once initiated, carried to completion.

Learning

The process of acquiring new, or modifying existing, knowledge, behaviors, skills, values, or preferences through experience or education.

Nervous System

Organ system of humans that includes the brain, spinal cord, sense organs (eyes, ears, etc.), and associated nerves. Receives, integrates, and stores sensory input; coordinates activity of other organ systems.